T-5 rebuild woes
11-16-2014, 07:05 PM
#1
2nd Gear Member
Thread Starter
Join Date: May 2010
Location: Georgia
Posts: 239
T-5 rebuild woes
This is for a classic mustang auto to manual swap but the trans came from a foxbody so I thought I would find better info here.
I got this t-5 second hand and mostly disassembled. I was trying to put it back together to get it in the car this weekend and ran into trouble with the front input shaft. The trans came with a new foxbody input shaft but lacked a bellhousing the only one I could find locally was from an sn-95 mustang so I had to get a different input shaft. I counted the teeth on the foxbody shaft and made sure to get the same 23T gear on the input shaft. I was having a heck of a time trying to install the bearing retainer then I noticed that the gear wasn't meshing correctly and the shaft was sitting higher up than it should be. I tried the foxbody one and it looks the same in there.
Is there only supposed to be 23T input shafts or are both of them wrong? If there is different shaft counts how would I know which one I needed I cant quite remember what year he said the trans came from...88 maybe? It is a world class. Can I go ahead and assemble the rest of the transmission or is it best to wait until I Figure this out?
I got this t-5 second hand and mostly disassembled. I was trying to put it back together to get it in the car this weekend and ran into trouble with the front input shaft. The trans came with a new foxbody input shaft but lacked a bellhousing the only one I could find locally was from an sn-95 mustang so I had to get a different input shaft. I counted the teeth on the foxbody shaft and made sure to get the same 23T gear on the input shaft. I was having a heck of a time trying to install the bearing retainer then I noticed that the gear wasn't meshing correctly and the shaft was sitting higher up than it should be. I tried the foxbody one and it looks the same in there.
Is there only supposed to be 23T input shafts or are both of them wrong? If there is different shaft counts how would I know which one I needed I cant quite remember what year he said the trans came from...88 maybe? It is a world class. Can I go ahead and assemble the rest of the transmission or is it best to wait until I Figure this out?
11-17-2014, 04:36 AM
#2
5th Gear Member
Join Date: Jul 2012
Location: ohio
Posts: 3,628
The gear on the input shaft is 4th gear, and all t5s to my knowledge use the same 4th gear 1.00 gear ratio. This is supposed to ensure easy replacement of the input shaft and makes them all interchangeable . How ever there are several different variances of gear ratios between 1-2 3 and 5. I suspect your 3rd or 1st gear on the main shaft is not the same ratio as the 3rd or 1st gears of your cluster shaft.
Since the trans was in pieces when you got it, the chances that the parts are not original to that transmission increase. We know 4th gear is a constant 1.00 through out the t5s. But if gears from different year/model specific t5s were thrown into the mix of parts then chances are that you have the wrong 1-2 or 3rd driven gears for that clusters ratio chart.
For instance, If you have an 86 1/2-89 with 1.29 3rd gear ratio main case/cluster shaft and you try to install a 90-91 with 1.33 3rd gear ratio main shaft/driven gears,,, the 3rd gear main will not mesh up to the 3rd gear cluster and will cause the main shaft to be out of line and the input shaft will not install correctly.
I hope this all makes sense to you lol its early and Im still only half way through my first cup of coffee.
Here is the chart from modern drive line that shows the various years of t5s, their intended models and gear ratios.
http://www.moderndriveline.com/Techn...ssion_spec.htm
Since the trans was in pieces when you got it, the chances that the parts are not original to that transmission increase. We know 4th gear is a constant 1.00 through out the t5s. But if gears from different year/model specific t5s were thrown into the mix of parts then chances are that you have the wrong 1-2 or 3rd driven gears for that clusters ratio chart.
For instance, If you have an 86 1/2-89 with 1.29 3rd gear ratio main case/cluster shaft and you try to install a 90-91 with 1.33 3rd gear ratio main shaft/driven gears,,, the 3rd gear main will not mesh up to the 3rd gear cluster and will cause the main shaft to be out of line and the input shaft will not install correctly.
I hope this all makes sense to you lol its early and Im still only half way through my first cup of coffee.
Here is the chart from modern drive line that shows the various years of t5s, their intended models and gear ratios.
http://www.moderndriveline.com/Techn...ssion_spec.htm
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