T-5 experts help!

Y'all here is my problem. My T5 jammmed in 4th gear and wouldn't come out with out a fight after a run at the drag strip, then it would go in and out of first gear fine if you didn't let the clutch out but would hang and have to be wrestled out of first if you let the clutch out and tried for second on a roll. 2,3,4,5 shifts worked fine. I have the trans apart but do not see any dammage to my untrained eye, Pictures attached. Anybody have an idea what could be wrong?
Thanks!

 

Not an expert, but I have had a couple apart.

I'd pull the input gear out of te front and check the needle bearings and the front bearing. Sound like you are getting some misalignment between the input and main shafts. Look up an exploded diagram of the trans if you are unsure of how to do this.


jerry

 

Take a good look at the shift forks. They are aluminum and if you have a stock shifter, every time you bang a shift, its the forks that take the impact. Sometimes it is very hard to see the cracks, but almost every one of these I've rebuilt had cracked shift forks.

 

Thanks for the help so far! I have the Hurst shifter with shift stops adjusted per Hurst instructions. I didn't notice any cracks but I'll take a closer look.

 

remove the plastic clips from the shift fork when you check for cracks. what do those plastic fork pads look like? some times if they are really worn it can cause problems like that

 

sure you don't have a clutch problem?

 

I chacked for cracks with magnavisor and didn't see any forks seem ok. The front input shaft had 1/8" play at front so I removed the input shaft retainer front roller bearing race seems smooth it came out of retainer by hand but wasn't sloppy. How much front to back play should the input shaft have?

 

I think none

 

Clutch is ok. I removed the clips and didn't see any cracks but the pads are worn, see attachment.

 

That's a world class T-5, right? What year?

 

i'm not sure how much front to back play theres supposed to be, but 1/8 inch sounds a little much, although there sould be some, if there is none it will burn up the thrust bearing behind the input gear. whats your pilot bearing look like?

 

i would think the reason its having trouble comming out of gear is because something is not releasing the input gear....clutch,plate,or a pilot bearing hanging up

 

heres an idea.,.move the shift clutch buy hand up on first gear and see if it shifts smoothly. 1st is the biggest gear at the back of the tranny

 

Slam49 Thanks for the help!
The pilot bearing looked ok but I replaced it when I installed the new trans anyway. The new trans worked ok with the same clutch till I messed it up last week. The 1/8" was up and down play at the pilot end of the shaft it seems loose to me maybe 1/16" front to back though. I can move all the shift sliders in and out by hand but it takes some force to get them all in and out of gear, it seems ok from what I remember of the 4 speeds I had apart but that was 35 years ago. The roller bearing race at the big gear on the main bearing seems smooth dull not shinny surface.

 

Input shaft end play isn't really endplay, but preload of .003" due to the bearing design - countershaft end play is .0005-.0050"

I'd check your synchros too - if you've got the carbon-fibre bonded ones, I've seen them separate & cause hard shifting....

 

Flat Ernie thanks! I have way more than .003" front to back movement on the input shaft. The syncros don't show any cracks or breakage in the areas I can see.
The syncros are black look like carbon fiber and are not magnetic.

 

From the pictures I see describing the difference I'd say yes. It came out of a 94 Mustang but was back dated to 93 HO specs, shorter input shaft I think.

 

Judd,
Go to the Ford transmission Forum. WWW.NETWORK54.COM/FORUM/260730/
These guys are highly knowledgeable on all aspects of Ford Trannys and very willing to help you out.

 

If you cant find any thing mech wrong in the trans . ck shift cover inter lock cam parts . carefully. my 2$.

 

A common modification. I've got a '94 T5 in my Fox-body Mustang - the input shaft on the 94-95 T5 was .67" longer than earlier years - many folks run them as-is, & some folks trim the pilot a bit. It's better to just change the input shaft - completely interchangeable with pre-94 Mustang T5.

 

Thanks again for the help!
I don't see any dammage or slack on the parts in the top cover. I think I will replace the nylon bushings on the shift forks and try to adjust the play on the input shaft and see what it acts like.