kfactor239
Junior Member
- Joined
- Nov 6, 2013
- Posts
- 17
- Reaction score
- 0
- Location
- Moore, Ok
- First Name
- ken
- Truck Year
- 6
- Truck Model
- C30
- Engine Size
- 454
I have an 86 dually and I have replaced the 454 with a chevy HT502 crate engine and the stock TH400 with a B&M Traveller TH400 transmission. Everything seems fine but my bolt on yoke seal keeps destroying itself. The first time I changed the seal I reinstalled the yoke but left the bolt a little loose to move the yoke away from the seal a bit (it seems if I tighten the bolt up it does not leave enough clearance for the seal). Well that didn't last long and the seal failed and it leaked. The next time I decided to change out the yoke I found a replacement yoke that was for a bolt on yoke but it was designed to be used as either a bolt on or a slip with a blank out plug where the bolt goes that you can either leave or remove. I decided to leave the plug in and install it without bolting it on as a slip yoke. Well that turned out even worse. What happened is my center bearing for my driveshaft came apart and Ive got one on order. My problem is that for some reason my output shaft is not sticking out long enough to allow the yoke to be bolted on and still leave clearance for the seal. The extension housing that came with the new transmission is identical to the one on the old one I had checked that before I sold the old transmission. I have also noticed that the slip for the driveshaft with the truck unloaded and sitting static isn't showing much spline. I think that as I am driving the truck the driveshaft slip is maxing out and pushing my front driveshaft forward. Does anyone know if a chevy 502 is longer than a 454? Thats all I can figure for the lack of slip clearance on the driveshaft. Oh and if the yoke has shoved the output shaft into the transmission I guess this could account for the lack of clearance for my yoke seal but I am not a TH400 expert at all if that is the case what would be damaged and what would the fix be.
Thanks
Kenny
Thanks
Kenny