The Stovebolt Site Forums The Shop Area Driveline 2000 T5 ?

Will a S10 4cylinder 2000 T5 match up to the GM bell housing on 58 GMC truck? Just want to be sure before buying.

Thanks in advance

2000 model year? I don’t think the S10 had a T5 in 2000.

Danny,

A quick search of 2000 S10 data on pages 33 and 35 of this document show an NV3500 5 speed being offered behind both the 4 cyl and 6 cylinder engines. It replaced the T5 and has an integral bell housing instead of the separate bell housing and transmission your truck came with.

From a bit of further reading, it seems the bell housing pattern will possibly bolt up, but there are other issues which will need to be addressed in making this transition. If you search the web for NV3500 transmission conversions you can see what is out there on the subject.

A recent conversation did discuss a shifter issue with a members' Chevy small block and NV3500 installed in his AD Chevy truck, but I couldn't find any conversations about using that transmission behind a '58 GMC.

Perhaps some of our GMC guru's will chime in with more info???

Dan

I didn't know that it was not separated. So that transmission is a "No go". This is why I reached out here first.
Thanks.

Hello down there in Brenham, Texas.
Just had to respond ! That 3 speed overdrive behind a 302 sounds like the cat’s meow already!
Why would you need to change it?
I believe the GMC was a sturdy 3 speed.
Hope can provide some pictures of what sounds like a pretty neat truck !
Charley

GMC did not offer an OD transmission on the 1 ton and smaller trucks from 55.2 through 60. Danny's OD must have come from somewhere else.

I will say this- with a 3.73 rear end and 215/75/15 tires (27.7 diameter), with my T5 I am in 5th gear at 40 mph. I chose the wrong rear end gearing. Unless I go back to the tall trailer tires that were in the truck when I bought it.

I was thinking a T5 might be better with stock rear3.90
Also bought 3.55 gears that I will never use

I will keep it the way it is.
By the way I also put a 3spd OD in my 1960 Bel Air sedan w 235.

Thanks everyone.

That is only 1800 RPM in 4th gear (1:1) at 40 MPH with your current setup Dave. And assuming a .82 OD in 5th gear on your T5, 40 MPH would be 1475 RPM.
Hardly over revving your engine in either case.

Bill,

The 261 is something that I am still getting used to- and I have no tach in the truck. I think that the rpm’s seem much higher to me than they are because I have never driven a stovebolt before (I just finished the truck this week). This engine must be way more comfortable pulling at low rpm’s than I realized᠁.

Please see this post from a week or so ago: https://www.stovebolt.com/ubbthreads/ubbthreads.php/topics/1498381/1.html

There are ways you can make the T5 work in the AD truck and have the first 3 speeds operate almost indistinguishable from the original (stock) AD setup. That is to say you will still be able to use it as a pickup. People occasionally tell me there's no way I could use a 3.07 rear end in a pickup or that I'm mistaken about my rear end gearing, but really it is all a matter of math and understanding the engineers who designed these trucks knew what they were doing. We're working on preparing a report that explains gear ratios, ratio options, etc and our hope is to make it a sticky message that will be easily accessible. With the original AD scheme, you had a rear end with a ratio of 4.11 and a transmission that began with a first gear ratio of 2.94...that gave you an overall first gear ratio of 12.08 (ideal for a half ton pickup with an inline 6). In my case I simply flipped the formula end over end and went with a first gear of 4.03 and a rear end of 3.07...which gave me an overall ratio of 12.37. The original AD transmission was a wide-ratio 3 speed ending in 1:1. The T5 can be generalized as a slightly less wide-ratio three speed transmission with a fourth gear of 1:1 and an overdrive 5th (which could have been between .72 and .86).

This post began as a question about the NV3500. That is a different animal from the T5. It is heavier and the ratios are different. There are other variants of it (used in Jeeps). One is the NV3550 and it separates from the bell housing, but to make it compatible with the GM bell housing you must buy or make an adapter. In my opinion the whole NV approach is both costly and could be a challenge to find the proper rear end (with a 6 lug hub and the correct width).

I have a t5 from an s10 in my 1954 with 2.73 gears from a 1979 Nova. I cruise at 70 and 2100 rpm. I have 235/75/ 15 tires.

If you can hear yourself think driving a Stovebolt engine on the highway, you are not revving it high enough.

Now that I have hearing aids I hear more than I want to. . I hear every rattle and clunk and I think did anything important fall off?