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Rear axle ratios, what's got what

EvilGenius

New member
Joined
Apr 20, 2004
Location
Davis, CA (near Sacramento)
Dave (owner of the fearsome V8olvo of LeMons fame) and I are talking rear end ratios for Volvo Dana 30s... And we'd like to know what's got what so we can go hunting, him for the V8 car and me for the 16V car. Is there a list somewhere? It'd be great to know what car with which trans option runs what rearend..... LeMons at TH in August is drawing near and neither of our cars have rear gears......

-John
 
3.31: 83-93 240 non-turbo w/manual trans. Early 960 (92 only? not sure. all were auto)

3.54: 740 turbo manual, I think. maybe some other 7/9 series. maybe in the odd V6 or diesel 240 series.

3.73: 83-93 240 non-turbo w/auto trans. 240 turbo manual.

3.91: Early 240 automatic, sometimes (70s to 81/82 range, you might find it, probably a 1030 axle). 240 Turbo automatic (1031 axle most likely). 242 GT.

4.10: some 242 GT maybe? late 940 n/a 8v (all were auto in the states). 16v 740 auto, so they say.

4.30 might be in the '75 240 auto, but I can't confirm.

Up to the early/mid 80s, you might find a 1030 axle with the smaller ring & pinion. Early cars with a 6cyl or turbo are likely the 1031 axle with the larger ring & pinion. I think all 7/9 series had a 1031 or 1041 which share the ring & pinion size. 1041 had the G80 locker. Carrier is interchangable among 1031, 1031, 1041.

No comment on the IRS stuff, but I don't think you're dealing with those anyway.

What ratio(s) do you want?
 
I knew you'd be the guy who knew this stuff. We're thinking a 3.31 for the V8 and a 3.54 for the 16V They currently have 3.73 and 4.10 respectively... I have an 85ish 740 with M47, I believe it has a 3.54 and it will go into the 16V We will hunt down a 3.31 for the V8
 
Did I hear right that the V8 car had a cambered axle housing?

Find the latest manual non-turbo 240 you can. '83-'85 range might have a 1030 and you don't want that behind the V8. 1031 for sure.
 
Uk/us??

Here in the UK at least some of the 745GLE16Vs (ie B234F) ones had 3.31s. Mine has. If you do the arithmetic, if you get as far as 6,000rpm in 5th and allow for tyre growth you can go very fast if you have enough power.
 
FWIW, my 3.31 came out of a 94 965. My 90 Regina 740 automatic that got the V8 originally had a 4.10. Have to admit, for street driving, the 3.31 is a much better choice than the 4.10. I was pulling 3k at 55mph in 5th w/ the 4.10
 
Did I hear right that the V8 car had a cambered axle housing?

Find the latest manual non-turbo 240 you can. '83-'85 range might have a 1030 and you don't want that behind the V8. 1031 for sure.

Yup, we bent it: heat, a porta-power and a chain (out of the car!) we got 2.5ish degrees across the axle, or about 1.25 per side. There is no extra load on the carrier bearings as the splines have plenty of slop.

So , we need a 3.31 1031, anyone out there got one!
 
Thank You For The Information

Great posts everyone. Thank you. My 1978 242GT Canadian has 4.11 rear gears, open differential. HB of CJ (old coot)
 
The last 430's I saw was on my 70 145.
The 140s had 410's by 71.
Special purpose vehicles probably got lower gears,
but as far as the cars go 70 was the last year for 430's.
 
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Yup, we bent it: heat, a porta-power and a chain (out of the car!) we got 2.5ish degrees across the axle, or about 1.25 per side. There is no extra load on the carrier bearings as the splines have plenty of slop.

How long has it been run since it was cambered?
 
So my car has a 3.73 then ('85 240DL, auto). I want a 4.10 for MOAR ACCELERATION. Guess I'll be looking for NA 940s in the JY now.

(edit)
According to my calculations, I've got a 3.54 effective ratio due to my 195/75/14 tires. I wonder how badly that hurts my acceleration... I guess I should test it by swapping the 195/65/14s on the front of my car to the back for some testing.
 
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3.31: 83-93 240 non-turbo w/manual trans. Early 960 (92 only? not sure. all were auto)

3.54: 740 turbo manual, I think. maybe some other 7/9 series. maybe in the odd V6 or diesel 240 series.

3.73: 83-93 240 non-turbo w/auto trans. 240 turbo manual.

3.91: Early 240 automatic, sometimes (70s to 81/82 range, you might find it, probably a 1030 axle). 240 Turbo automatic (1031 axle most likely). 242 GT.

4.10: some 242 GT maybe? late 940 n/a 8v (all were auto in the states). 16v 740 auto, so they say.

4.30 might be in the '75 240 auto, but I can't confirm.

Up to the early/mid 80s, you might find a 1030 axle with the smaller ring & pinion. Early cars with a 6cyl or turbo are likely the 1031 axle with the larger ring & pinion. I think all 7/9 series had a 1031 or 1041 which share the ring & pinion size. 1041 had the G80 locker. Carrier is interchangable among 1031, 1031, 1041.

No comment on the IRS stuff, but I don't think you're dealing with those anyway.

What ratio(s) do you want?

4.30 ratio pretty much in all 740/940 wagons with Regina
3.91 was pretty much in all the b-21f's with 4 speeds or 4+od
4.10 early 240 sedans with 3 speed auto's
thought I would add that in there for good measure !
 
4.30 ratio pretty much in all 740/940 wagons with Regina
I doubt it, but I'll check the next time I see one at the junkyard.

4.10 early 240 sedans with 3 speed auto's
My old '78 244 DL w/3spd auto (AW55) was 3.91 1030. Checked the tag on the diff after Mr. Bill bought it from me.

I pulled a 3.73 1030 from a '79 244 DL and I'm using it in my '87. I can't remember now if it had a 4spd or an auto, but I think it was auto.
 
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