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Old 07-15-2008, 09:55 PM   #51
lummert
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Default Official Differential Information

I have found more info:

1992 Volvo Tech & Spec dated: September 25, 1991
ABS Brakes: Anti-lock brakes will be standard equipment on all 1992 Volvos sold in the United States.
Automatic Locking Differential: The automatic locking differental is standard on all 740, 940, and 960 Volvos.

1993 Volvo Tech & Spec dated: September 11, 1992
ABS Brakes: Anti-lock braking system is again standard equipment on all new Volvo models sold in the U.S.
Automatic locking differential:
940: Both sedans and wagons are equiped with an automatic locking differential.
960: Both sedans and wagons are equiped with an automatic locking differential.

1994 Volvo Tech & Spec dated March 15, 1994
ABS Brakes: Anti-lock braking system is again standard equipment on all new Volvo models sold in the U.S.
Automatic locking differential: All new 940 series Volvos sold in the U.S. for 1994 will be equiped with an automatic locking differential as standard equipment. All 960 sedans & wagons have an automatic locking differential.

1995 940 sedans & wagons: ABS & ALD are standard as per 1995 Volvo 940 Features.
1995 960 wagons: ABS & ALD are standard as per 1995 Volvo 960 Features.

I will have the ratios and what is fitted with ABS & ALD later, I don't have it sorted yet.
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Old 07-15-2008, 09:57 PM   #52
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Bought a powertrax ez locker. LOVE IT, minus the fact that it sounds like a car with bad CV axles when you turn.
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Old 07-15-2008, 11:40 PM   #53
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hm - did the G80 come in various other vehicles as well? seems like GM used them (by the look of one of those adverts). and we're saying that we can take the G80 diff (the core, inside the housing), and swap it with my POS open diff? as BDKR asked; are we dealing with the same number of teeth on the splines? do I swap the pinion and ring gear onto the G80 as well?

I'm starting to get the terminology for the different rear ends too... sounds like I've got a Dana 31 aka M31 aka 1031. I think I'm liking the G80 setup... although I'm sure there'll be a lot of benchmarking of all the different diffs in here. the 1030 was in some early 240s, and the 1041 has the G80 (as stated by peehound up there).

so we're saying, find myself a G80 diff, cut 2 of every 3 teeth on the tone ring gear, and chop the flywheel weight off. then remove my rear wheels, remove backside of diff housing, loosen axles, slide them out, take out my open diff, chop a cm off the passenger-side axle, and plug in the G80. swap the ring gear if necessary....

I think this is slowly coming together...

Sim

thanks,
Sim
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Old 07-16-2008, 12:01 AM   #54
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My Syclone has a G80 locker in it.
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Old 07-16-2008, 12:15 AM   #55
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Quote:
Originally Posted by 2manyturbos View Post
Kildea,

Take a look at the pictures. It looks to me like what actually locks the 2 axles together are the splines on 2 of the disc shaped parts. That is what is meant by locker. Mechanically locked together. A clutch type limited slip actually uses clutch discs just like in an automatic trans clutch pack to drive the axles at the same speed. When the clutch discs wear, no more limited slip. I have never taken a G80 apart, however, it looks like the rest of the Eaton lockers to me. Pure mechanical interlock. So, with the locker in the pictures, what do the clutches do? Do they actually drive the axles, or do they cause mating collars to move relative to each other causing them to lock toghther, just like in a manual transmission?


no there is no mechanical lock, the two pieces are ramps they ramp against one another and compress the two wet clutchpacks in the photos.

the splines you mentioned above connect the spider gear to half of the clutches, you'll notice the mating splines on the inside diameter of the clutch pack in the photo, the outside ears on the other half of the clutch discs are mounted to the housing, so as the clutch discs are compressed it locks the housing to the spider gear, while they are not compressed the spider gear is free to turn independent of the housing.

there is no mechanical locking in this differential, i took it apart, modified it and reassembled it, if you do the same you will see that the clutchpacks are what causes the locking.

Quote:
Pure mechanical interlock
take one apart or look again at the photos this is just false, sorry

if you read my follow-up post you will understand the process, the flyweights lock the ramp with respect to the housing, this causes the ramps to slide relative to one another and as i said above compress the clutchpacks, without the compression the ramps would just keep bumping over each other and it would never "lock"

Last edited by kildea; 07-16-2008 at 12:21 AM..
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Old 07-16-2008, 12:23 AM   #56
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yeah - I think it's clear how it works, with those videos.

Sim
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Old 07-16-2008, 12:42 AM   #57
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http://cgi.ebay.com/ebaymotors/26-sp...spagenameZWDVW

a G80 from '87... with a 26 tooth spline. arg.

http://cgi.ebay.com/ebaymotors/GM-7-...spagenameZWDVW

and a 28 spline... are we sure the 1031 has a 27 spline?

Sim
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Old 07-16-2008, 12:48 AM   #58
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Quote:
Originally Posted by simey_binker View Post
yeah - I think it's clear how it works, with those videos.

Sim


**** i din't see those before, that's pretty cool ...

another option is the ez-locker style, which replaces the spider gears in your current setup, it's a mechanical type and somewhat more noisy ... but they are cheap and easy to install ... just an idea:

something like this:
http://cgi.ebay.com/ebaymotors/Jeep-...spagenameZWDVW


also you need one for a dana 30 ... the gm pumpkin will not fit.
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Old 07-16-2008, 12:54 AM   #59
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don't I have a Dana 31? 700-series Volvo?

Sim
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Old 07-16-2008, 01:03 AM   #60
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i always thought it was a dana 30, that's what i have.
the 1031 is the volvo axle casing type, shared by several years in 240 and 740 for sure.
the 1031 houses a dana 30 diff.
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Old 07-16-2008, 01:26 AM   #61
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Quote:
Originally Posted by kildea View Post
i always thought it was a dana 30, that's what i have.
the 1031 is the volvo axle casing type, shared by several years in 240 and 740 for sure.
the 1031 houses a dana 30 diff.
oh man, now my brain is messed; so the 1031 doesn't house a Dana 31? is there such thing as a Dana 31? M31? I thought Volvo simply swapped the "Dana" or "M" with a "10".

eff.

Sim
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Old 07-16-2008, 02:08 PM   #62
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Perhaps this is the answer?

Quote:
Originally Posted by http://www.volvo-forums.com/t15665-are-volvo-differentials-dana-30s.htm
The difference between the 240's Dana 30 and the 700 series Dana 31 is the 30 series uses a 7.2" ring gear while the 31 uses a 7.562". This small increase in diameter of the ring gear and the larger pinion gear (1.376" vs 1.406") adds up to a marked increase in strength.
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Old 07-16-2008, 02:24 PM   #63
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Quote:
Originally Posted by kildea View Post
**** i din't see those before, that's pretty cool ...

another option is the ez-locker style, which replaces the spider gears in your current setup, it's a mechanical type and somewhat more noisy ... but they are cheap and easy to install ... just an idea:

something like this:
http://cgi.ebay.com/ebaymotors/Jeep-...spagenameZWDVW


also you need one for a dana 30 ... the gm pumpkin will not fit.
The ez-locker is the design I was thinking of. Having never disassembled a G80, I made the incorrect assumption it was the same design. According to the ez-locker website, that locker design unlocks the out side axle in turns. That would really suck for any kind of racing application. The G80 is looking better all the time.
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Old 07-16-2008, 02:26 PM   #64
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Quote:
Originally Posted by kildea View Post
**** i din't see those before, that's pretty cool ...

another option is the ez-locker style, which replaces the spider gears in your current setup, it's a mechanical type and somewhat more noisy ... but they are cheap and easy to install ... just an idea:

something like this:
http://cgi.ebay.com/ebaymotors/Jeep-...spagenameZWDVW


also you need one for a dana 30 ... the gm pumpkin will not fit.

That's not a bad price.

I was looking at one of these.

http://store.summitracing.com/partde...5&autoview=sku
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Old 07-16-2008, 02:34 PM   #65
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Quote:
Originally Posted by lummert View Post
I have found more info:

1992 Volvo Tech & Spec dated: September 25, 1991
ABS Brakes: Anti-lock brakes will be standard equipment on all 1992 Volvos sold in the United States.
Automatic Locking Differential: The automatic locking differental is standard on all 740, 940, and 960 Volvos.

1993 Volvo Tech & Spec dated: September 11, 1992
ABS Brakes: Anti-lock braking system is again standard equipment on all new Volvo models sold in the U.S.
Automatic locking differential:
940: Both sedans and wagons are equiped with an automatic locking differential.
960: Both sedans and wagons are equiped with an automatic locking differential.

1994 Volvo Tech & Spec dated March 15, 1994
ABS Brakes: Anti-lock braking system is again standard equipment on all new Volvo models sold in the U.S.
Automatic locking differential: All new 940 series Volvos sold in the U.S. for 1994 will be equiped with an automatic locking differential as standard equipment. All 960 sedans & wagons have an automatic locking differential.

1995 940 sedans & wagons: ABS & ALD are standard as per 1995 Volvo 940 Features.
1995 960 wagons: ABS & ALD are standard as per 1995 Volvo 960 Features.

I will have the ratios and what is fitted with ABS & ALD later, I don't have it sorted yet.
I know that is what Volvo's literature says, however, quite a few 1991-93 turbo and NA 740/940s did not get the locker. A 92, 940 NA I just sold this week has the locker in it. A 39,000 mile garage queen 1993, 945 NA I parted 2 years ago did not have the locker in it. The car was untouched. It got T-boned so I bought it for parts. No locker in that car. A local Volvo repair shop owner has a 1993 turbo that he bought from his customer that bought the car new. It also does not have the locker diff in it and it has never had the axle replaced. The more you work on Volvos, the more you realize their documentation is very questionable and nothing is set in stone. Volvo literature also says the 1987, 780 Bertone was available with optional 16" alloy wheels. Has anyone ever seen one that came with 16" alloys from the factory?
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Old 07-16-2008, 02:41 PM   #66
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Quote:
Originally Posted by BDKR View Post
Perhaps this is the answer?
the early 240's had a 1030 differential housing, the later ones (like mine) had the 1031 case, the casting on my 1031 stock open diff is that of a dana 30, the ring gears are different between the 1031 and 1030 (as well as the 1041 for that matter) but they should all use the same dana 30 differential, either ring gear fits the same pumpkin.
same spider gears, same nbolt pattern same diameter cast metal hunk of poo.
in my case i put the original 410 gears from my open diff onto my g80, it came with the beefier 411 ring gear still attached but the seller wanted that to go to another buyer (didn't have time to remove it before sending it to me), of course if you change the ring you must also change the pinion, figure that's obvious though, no?


and like he said above ... there were definitely late model 7 series cars with open diffs i have a friend with one - he welded his, works well, but it's a bitch to push when it breaks down
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Old 07-16-2008, 03:28 PM   #67
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It would seem then that the powertrax unit I was looking at earlier would be fine for my use. I'm not drifting, drag racing, or doing tons of burn outs (not doing any as a matter of fact), so it should hold up.
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Old 07-16-2008, 04:31 PM   #68
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First post here!

I was wondering if anyone had accurate measurements on the width of various Volvo axles. I am building a Locost (homebuilt Lotus 7 replica), and am in search of a solid rear axle. Living in Vermont, there are plenty of older Volvos around, so it would be a good option if I can find one the right width.

Primarily looking for WMS (Wheel Mounting Surface) to WMS width.
Thanks!
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Old 07-17-2008, 03:55 PM   #69
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updating with new links... I'll organize this shat soon...

conversion:
http://forums.turbobricks.com/showthread.php?t=84755

axle talk:
http://forums.turbobricks.com/showthread.php?t=142238

Sim
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Old 07-17-2008, 04:02 PM   #70
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Quote:
Originally Posted by gtivr4 View Post
First post here!

I was wondering if anyone had accurate measurements on the width of various Volvo axles. I am building a Locost (homebuilt Lotus 7 replica), and am in search of a solid rear axle. Living in Vermont, there are plenty of older Volvos around, so it would be a good option if I can find one the right width.

Primarily looking for WMS (Wheel Mounting Surface) to WMS width.
Thanks!
nice, welcome to the crew.

my "axle talk" link wasn't referring you to that thread; I don't think they've started talking about widths yet. and I don't know the widths for the 1030 or 1031... I'm still trying to get a grasp on all this.

Sim
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Old 07-17-2008, 07:54 PM   #71
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This might not be correct, but, this is what I have found in Volvo Specifications.

I am starting with 1991 model year as that is when the lockers first appeared.

1991 Volvo 740 w/ B230 F AW 70L 3.73:1 TLD (option) ABS (option)
1991 Volvo 740 w/ B230 F M46/M47 3.31:1 TLD (option) ABS (option)
1991 Volvo 740 w/ B230 F M46/M47 3.54:1 TLD (option) ABS (option)
1991 Volvo 740 w/ B230 F M46/M47 3.73:1 TLD (option) ABS (option)
1991 Volvo 740 TURBO w/ B230 FT AW 71 3.73:1 TLD (standard) ABS (option)
1991 Volvo 740 TURBO w/ B230 FT AW 71 4.10:1 TLD (standard) ABS (option)
1991 Volvo 740 TURBO w/ B230 FT M46/M47 3.31:1 TLD (standard) ABS (option)
1991 Volvo 740 TURBO w/ B230 FT M46/M47 3.54:1 TLD (standard) ABS (option)
1991 Volvo 740 TURBO w/ B230 FT M46/M47 3.73:1 TLD (standard) ABS (option)
1991 Volvo 940 GLE w/ B234 F AW 72L 4.10:1 TLD (standard) ABS (standard)
1991 Volvo 940 TURBO w/ B230 FT AW 71 3.73:1 TLD (standard) ABS (standard)

1992 Volvo 740 w/ B230 F AW 70L 3.73:1 TLD (standard) ABS (option)
1992 Volvo 740 TURBO w/ B230 FT AW 71 3.73:1 TLD (standard) ABS (option)
1992 Volvo 940 GL w/ B230 F AW 71 3.73:1 TLD (standard) ABS (standard)
1992 Volvo 940 TURBO w/ B230 FT AW 71 3.73:1 TLD (standard) ABS (standard)
1992 Volvo 960 WAGON w/ B 6304 F AW 40 3.91:1 TLD (standard) ABS (standard)

1993 Volvo 940 w/ B230 F AW 71 4.10:1 ALD (standard) ABS (standard)
1993 Volvo 940 TURBO w/ B230 FT AW 71 3.73:1 ALD (standard) ABS (standard)
1993 Volvo 960 WAGON w/ B6304 S AW 30, AW 40 3.31:1 ALD (standard) ABS (standard)

1994 Volvo 940 w/ B230 FD AW 71 4.10:1 ALD (standard) ABS (standard)
1994 Volvo 940 TURBO w/ B230 FT AW 71 3.73:1 ALD (standard) ABS (standard)
1994 Volvo 960 WAGON w/ B6304 S AW 30, AW 40 3.31:1 ALD (standard) ABS (standard)

1995 Volvo 940 w/ B230 FD AW 71 4.10:1 ALD (standard) ABS (standard)
1995 Volvo 940 TURBO w/ B230 FT AW 71 3.73:1 ALD (standard) ABS (standard)

ALD: Automatic Locking Differential
TLD: Tractional Lock Differential
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Old 07-17-2008, 08:06 PM   #72
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Quote:
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Bought a powertrax ez locker. LOVE IT, minus the fact that it sounds like a car with bad CV axles when you turn.
Sweet! How was installation?
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Old 09-24-2014, 03:51 PM   #73
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Reviving and old thread.

See the information on this page. Should help.

http://people.physics.anu.edu.au/~am...volvo_dana.htm

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Old 09-25-2014, 10:02 AM   #74
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Reviving and old thread.
an old thread. Not and.
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Old 11-15-2020, 03:08 PM   #75
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More revival of "and" old thread.

In the final analysis, having watched the videos of the G80, the lockup function is indeed mechanical, not clutches at all. Thus, a friction modifier for the "true" G80 is not necessary. Agreed?
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