What years and models did the T-5 come in and does anyone happen to know if they are an overdrive or is 5th gear 1 to 1?

 

overdrive is an automatic trans function not a manual

 

^^^^i hope that was a joke

 

It was introduced in about 81 or so, and sold well up into the 90s... it's been in everything from trucks to Mustangs to our cars.... all of which are EXACTLY the same, except for being COMPLETELY different.

4th is 1:1. 5th is an overdrive, since the output turns faster than the input; usually by a ratio in the .6:1 to .75:1 range (which varies by what vehicle it was made for, and therefore what ratios the vehicle mfr ordered from B-W).

 

thanks my local junk yard has an abundance of 3rd gens so are all the 5 speeds in them the T-5? anything special to look for? any differences or weaknesses of one out of a V-6 car?

 

Dont get a V6 one, its way too much hassle to put in a V8 car. You'll want an 88-92 T5 from an f-body, those are the world class units and slightly stronger than the 83-87 units.
More info can be found by doing a search. This is a very common topic on this board.

 

Stay FAR away from the V6 ones. They're easy to spot. All you have to do is ask how many splines are on the input shaft. All V6 T5's have a 14 spline input, all V8 F-body T5's have a 26 spline input. I also agree that you should try to get an 88-92 World Class unit. As far as 5th gear ratio goes, the T5's in the TPI cars have a .73 5th, the TBI models have a .63 5th. The .73 5th is the one you want if you have a choice. The .63 5th is too big of a drop from 1:1 in 4th.

 

Here's a chart that'll be invaluable to you when shopping for a T5. https://www.thirdgen.org/forums/tran...t5+ratio+chart

 

damn thanks a lot guys this narrowed it waaayyy down. I have a 305 TPI with an auto not quite sure which one but i want a 5 speed to go in my 65 LeMans. I got the motor and tranny for free and it came out of a rear end wreck firebird with only 20,000!