Thread: Th2004R swap
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Old 03-23-2017, 07:54 AM   #8
James the III
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Join Date: Nov 2016
Location: lowell ma
Posts: 750
Re: Th2004R swap

Quote:
Originally Posted by Steve66 View Post
Thanks for your answers. That helps me a lot. What about the speedometer cable? Anything different there?
Well.. the cable will screw on. but like every transmission with a cable..
The speedo gear set are for that vehicle it came out of..
Take mine spare 2004r that will get rebuilt. it came out of a 87 monte LS
with a rear gear of 3.23 and had 215/65/15 tires (26" tall)
So, in a vehicle with different rear end gears and /or taller tires.. the speedo will read incorrectly..

The monte SS 83-85 had 3.42 gears and 26" tall tire
The monte SS 86-88 had 3.73 and 26" tall tire
The GN had 3.42 and a 26" tire
the olds 442 had 3.42 iirc.
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