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Official differential information.

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
 
Perhaps this is the answer?

http://www.volvo-forums.com/t15665-are-volvo-differentials-dana-30s.htm said:
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.
 
**** 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...007QQitemZ170239153328QQrdZ1QQsspagenameZWDVW


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.
 
**** 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...007QQitemZ170239153328QQrdZ1QQsspagenameZWDVW


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/partd...-2210-LR&N=700+400018+305029+115&autoview=sku
 
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?
 
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 :)
 
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.
 
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!
 
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
 
Official Differential Information

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
 
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?
 
:nono:

G80's have clutches but do not require friction modifier.

Both synthetic and mineral based are sufficient. Although the G80 uses clutches, it is a full locker. If you use a friction additive this can reduce torque / load carrying capacity and is not recommended. As far as oil weight, please use the specified oil weight and quantity in your vehicles owner's manual. Eaton has no oil brand recommendation. Thanks, -Eaton Performance Support
 
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?

No. The Volvo G80 definitely has a clutch pack. Take a look at the disassembled G80 in this modification thread.

http://www.turbobricks.com/mods.php?content=art0027
 
But they are not the same type of clutch as in a conventional, LSD. That is, they are not controlling the "slip". Thus, do not require the modifier. Is that it? These G80 threads are like politics :lol:. Somebody please tell me, in logical terminology, why these clutches require the modifier, or do not---puhlEEEZ. I'm dying to know. Thanks Hi-Perf, I have indeed seen Eaton's input.

I also found a thread in which someone says no, they do not require the modifier, but the G80 will run quieter with it.
 
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