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Krautmister 11-25-2006 09:32 PM

rear end ideas
 
This rear end came out of 83 300sd, there are part numbers on it. I'm trying to find the ratio? My current 240d 4spd has stock rear end, which I would also be wondering is 3:69?...Here is the numbers if anyone can help...thnx (1153513208)-and-(1233510101)

rudolfgreen 11-25-2006 09:49 PM

think its 3.08 in the sd.. def 3.69 in the 4spd.. man, rear ends are great.:D

Krautmister 11-25-2006 09:52 PM

Wouldn't that be so much better? Oh I hope because then I'm doin good right?

rudolfgreen 11-25-2006 10:05 PM

was exploring this avenue before..
but have been convinced that the 3.08 is too big for the 4spd n/a 616.

it is the 3.46 rear from the automatic n/a 123chassis that are the easter egg.
the 2.47 most definitely is the desirable turbo route.:D

Krautmister 11-25-2006 10:08 PM

Whoa, I have 617.952 4spd, so this rear end would be awesome correct, at least better on the interstate. If so I'm on my way to swap like 2sec from the garage and its on...Thnx for the replys I hoping this will calm rpm's at cruise...

ForcedInduction 11-25-2006 10:12 PM

The 3.69 is fine for me.

Krautmister 11-25-2006 10:17 PM

Well the low end is awesome, but high end blows. This rearend is just laying here in my shop and hell if I can gain something why not?...I read 60mph at 2000rpm and she sounds like its screamin lol....Hey thanks guys, for this. We are waiting to blow this out real quick...

JimmyL 11-25-2006 10:18 PM

rear end ideas
 
I'm not allowed to have any rear end ideas in this house.
Wait, was that out loud...........:silly:











:D

ForcedInduction 11-25-2006 10:19 PM

Quote:

Originally Posted by Krautmister (Post 1339942)
I read 60mph at 2000rpm and she sounds like its screamin lol

Either you ment 3000rpm or you already have a 2.47 installed....

Krautmister 11-25-2006 10:22 PM

Hmmmm, then maybe the tach is off...Anyway to read its signal with a meter?...So what about the diff swap here, will the 3:08 yeild something?

rudolfgreen 11-25-2006 10:25 PM

Quote:

Originally Posted by ForcedInduction (Post 1339934)
The 3.69 is fine for me.

this.. :thinking2 ..would be the voice of reason 617.952+4spd combination..

rudolfgreen 11-25-2006 10:27 PM

are we talking about changing the differential in your 240?
feel like there's apples and oranges flying about..

ForcedInduction 11-25-2006 10:29 PM

I think a 3.08 would be too high a gearing for a stock 240D. It *will* make it slower around town and during acceleration.

Krautmister 11-25-2006 10:29 PM

Ok here...I have 617.952 4spd 240d same car as forced...I have triple k turbo 3" exhaust straight ...with 3:69 rearend...I have spare 3:08? laying in the floor...I asking about the gains or losses of this swap...my interstate cruising seems harsh with 3:69 in 4th gear...better?

ForcedInduction 11-25-2006 10:31 PM

Quote:

Originally Posted by Krautmister (Post 1339961)
Ok here...I have 617.952 4spd 240d same car as forced...I have triple k turbo 3" exhaust straight ...with 3:69 rearend...I have spare 3:08? laying in the floor...I asking about the gains or losses of this swap...my interstate cruising seems harsh with 3:69 in 4th gear...better?

Much better, I thought it was a stock 240. :D In that case, a 3.08 should be a good match. I just like the extra acceleration/torque the 3.69 puts to the ground.

Also, the SD and D will need different axle shims. You should be able to swap them across.


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