Transmission Grind

Mike Holt

Member
Swapped transmissions and the new one would grind going into second, no matter what speed. I could snatch it hard into second. But still made noise and hard to shift.
So, I pulled it and sent it back.
The guy has been working with me well. But, he’s at a loss. When I sent it back, he tore it down and couldn’t find any issues. He installed it in his test car (Fox Body 5.0) and it worked fine. He sent me video of the test.

So, what would cause it to not shift in my car but works fine in his?

I have stock drive line (bell housing, shifter etc).
 

Mike Holt

Member
Wouldn’t a shifter flaw cause problems in all gears? It shifted fine in every gear except second.

I dunno, I’m grasping at straws.
 
Last edited:

Danbo

FFR6198 Dan Deitz
Contributing Member
What’s the gear ratio in your car and the Foxbody... more curious.
 

Scott Harrison

"Growing old is mandatory, growing up is optional"
Staff member
Contributing Member
Member
Makes no sense that it works in his car but not yours. If your clutch is dragging it should affect all gears. Maybe it does, but only the synchros in 2nd can't overcome the drag.
 

phileas_fogg

John Sitton
Member
As CraigS posted on another forum, check that the rubber boot on the transmission tunnel cover isn't hindering your shift into 2nd. Also check the rubber boot on the shifter itself isn't interfering with the 3/4" framing under the tunnel cover.

If the former is the problem, you can replace the rubber boot provided by F5 with a vinyl one from Mike Everson (http://www.replicaparts.com/shift boot page.htm) of have a boot made.

If the latter, you may have to remove / rework the 3/4" framing.


John
 

phil mead

Contributing Member
Member
Weird....the only things that could cause it are shifter interference or clutch. Is your thowout bearing retainer the stock aluminum one, or is it steel? The stock ones wear out and can cause the bearing to drag. Did you replace the clutch? Scott has a point about only 2nd being effected. I have heard about and experienced 2nd gear synchro issues. Keep us posted.
 

phil mead

Contributing Member
Member
Check the throw-out bearing retainer for "ridges". My stock aluminum one developed grooves that did not let the bearing slide freely. If the builders test car is using an aftermarket bell housing it could be the difference???? Clutch fork damaged???? Getting full movement at fork???? I have a slightly used centerforce clutch you can have if you want to try it.
 

Mike Holt

Member
Try number two worked.
Buttoned it up today and it shifted fine throughout the range.

Only thing I did different this time is replace the pilot bearing. I know, I know, shoulda done that the first time around!

The old bearing was kinda dry. So, I guess it’s possible there was enough drag there to mess with the second gear synchros.

Dunno. But, she’s running again! Just in time for the crappy weather! ;)
 
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