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10-13-2012, 09:19 PM | #1 |
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Rear end ID
rear end has the following 3896838 GM53 87890 and in the 2 o'clock passenger side TDE1211W2 can't find the link to id this rear end, any answers would be appreciated, thanks in advance
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10-13-2012, 09:34 PM | #2 |
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Re: Rear end ID
Do you have any pictures of it.
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10-13-2012, 09:54 PM | #3 |
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Re: Rear end ID
Just took it off my '72 to put on my '67 and started the cleaning process. then came nitefall. I went out side and rit down the numbers I saw and figured I would need for one of the many professional classic truck guys would need. So, long story no pics sorry
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10-13-2012, 10:15 PM | #4 | ||
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Re: Rear end ID
Unless it came out of a '72 C20 (which could have been a 12-bolt, Dana 60, or an Eaton HO)... it's gonna be a 12-bolt.
Gary
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10-13-2012, 10:35 PM | #5 | |
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Re: Rear end ID
Quote:
TDE '70 CA10 3.07:1 open 1211 December 11th W2 Warren Gear 2nd shift
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10-13-2012, 10:40 PM | #6 |
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Re: Rear end ID
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10-13-2012, 10:51 PM | #7 | |
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Re: Rear end ID
Quote:
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10-14-2012, 05:22 AM | #8 |
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Re: Rear end ID
So, if it's 3.07 I will be cruzin some really low RPM's with a 700R4 tranny I plan to put in it! Should equate to some really decent gas mileage too, thanks guys.
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10-14-2012, 06:07 AM | #9 |
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Re: Rear end ID
Doesn't work that way. It is probably too high of an effective gear ratio in 4th. About 2.15:1. Once you get past that sweet spot where the RPMs are low and the engine is still making enough power your mileage goes out the window as the motor begins to lug. You are going to need different/deeper gears with just about any engine.
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10-14-2012, 07:51 AM | #10 |
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Re: Rear end ID
ok then, good to know. I still have the rear from the '67, need to check those gears. it has a straight 6, three speed tranny. The reason I am swapping is the 6 lug rear on the '67 and the 5 lug on the '72 that and the cancer on the '72.
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10-14-2012, 09:16 PM | #11 |
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Re: Rear end ID
New question, I have a '72 5-lug rear end with 3.07 gears and a '67 6-lug with 3.73gears. Can I take the axles from the '72 and exchange them with the '67's? The reason I am asking is I am wanting to change to the lower gear due to the fact that I will be putting a 700R4 tranny.
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10-14-2012, 10:01 PM | #12 |
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Re: Rear end ID
At this point there is no simple solution. Your axle code indicates a '70 MY application. You had it in a '72 truck. It has 5 lugs, so it is likely a wide housing. But it could also be a narrow housing. Here is a link to a thread on housings and in it I placed an axle chart from the GM parts catalog. Read up, then measure both rear ends and their axle lengths, verify ratios in both and look for things like backing plate spacers. Let us know how everything compares.
http://67-72chevytrucks.com/vboard/s...d.php?t=547192
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10-14-2012, 10:54 PM | #13 |
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Re: Rear end ID
If not will the gears transfer, pumpkin to pumpkin?
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10-14-2012, 11:30 PM | #14 |
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Re: Rear end ID
Should, but they need to be reset and some people won't do used gears in a different housing. In the end it might just be easiest to set up some new gears and a L/S or locker.
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