3 speed to 4 speed in a '68 travelall??

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darren y

Member
I have a '68 Travelall that has the 241 with a 3 speed (shifted on the column) anyway the output shaft sheered off right @ the threads, which creates a hell of a vibration while driving!!

Anyway rather than rebuilding the 3 speed, will a t-98 4 speed out of a truck bolt up to the bellhousing??

(I understand I need to cut a hole in the floor, possibley change the tc location, & mix match drive shafts but I have all the parts...)

is the input shaft a similar distance?? Piolot bushing??

Some has to have done this before, give me your input please
 
Looks like I have a t-10 4 speed here in the garage, just gotta get the 3 speed out to measure the length of the input shaft, hopefully it will work with the 3 speed bell housing??
 
The input shafts should be the same length. The only problem you might find is that the index hole for the front bearing retainer might be bigger on the 4 speed. If so a machine shop can fix that.
 
What I thought was a t-10 is actually a t-98 with 4:1 first, looks like it should bolt right up, input shafts are the same, the bell housing has the right holes for both the little 3 speed that was there & the big 4 speed that's going in. My intermeadiae shaft is going to be shorter as the 4 speed is abot 4" longer, might have to get one made with a cv joint in the middle??
 
T-98 is in!! Now I just need to get a custom short jack shaft made, it's just over 7" between the t-98 & the t-case (202?), my shortest shaft is 11".
Also have to modify the t-case linkage, make it a few inches shorter & put a new hole in the trns tunnel.
 
New short shaft 6 3/4" long with 3/4" of slip $300!! Ouch!!
But it runs/ drives great (for a t98)
need to patch/seal up the trans tunnel, pick up a shift boot
& then just drive it a little to see how much better the gearing is with the t-98 versus that puny 3 spd it had.
 
Wish ida known,gota 11" cuda sold ya for $100,but wuda needed cut down yet.Jeff
 

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Been there tried that....
Shortest we came up with was 7-7/8"
I needed 6-5/8"
we cut up 2 short shaft & one 3' shaft attempting to make the super short one...
 
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