C4 tranny,repairable in van or not?


#1

1975 E250 van,tranny rebuilt 5 years and 4000 miles ago, lost reverse all other gears work, is it fixable in van or will it have to be removed and taken to a transmission shop?


#2

You can drop the tranny pan and valve body with the tranny in the vehicle. Once the valve body is out, take it apart and look to see if the o-ring on the spool valve for reverse is still intact.

Tester


#3

So, the 1-2 and 2-3 shift works good??? How about engine braking in L1? Drive forward to about 15mph and drop the gear selector to L1. You should feel the van downshift and feel engine braking. Do you feel this??

transman


#4

Hi,just tried your suggestion and by shifting into 1st it actually feels like it is upshifting, from 3 to 2 works but 2 to 1 feels like it is going back to third. Not good huh?


#5

Sounds like the rear band or band servo. I’d probably let a trans shop take a quick look to see whether it is something simple with the band.

transman