On my third R154 tailshaft seal

[shipkiller]

I have a Soarer R154 with the supra extension housing, everything was perfect but then I rebuilt it and the output shaft oil seal leaks. I changed it twice now with brand new toyota seals, the fullface side facing the rear of the car and yet it keep leaking quite badly. The driveshaft is the same one, nothing happened to it and the surface is almost perfect (the chromed female spline exterior). I even tried a W58 one (some say that it is a tad tighter, not sure) but no dice.

EDIT: forgot to mention, I'm running 3L of MT90 and a 3" aluminium 1piece driveshaft
Is there a breather on the R154 ? why does it keep leaking.

 

[Maple191]

its possible the output shaft has a burr or scratches on it, causeing the seal to damage.

 

[Poodles]

Worn bearings allowing the shaft to move.

 

[shipkiller]

It might be worth looking into, but the bearing is new and the tip of the shaft is in perfect condition.

 

[shipkiller]

Update!!
The driveshaft u-joint was semi-seized, it would block and fuck up when I put the trans in reverse. The trans will get a new seal and the driveshaft is at the shop for a well-due rebuild.

 

[ToySup88]

Did your leak problem get resolved?

I also have a leak. It started around the same time I got a 1-piece aluminum driveshaft. I replace the seal once but it still leaks. I read some posts where maybe the aluminum driveshaft might have a slightly small yolk diameter.

Anyone else notice a leak with aftermarket driveshafts? Any recommendations for a different seal? I read the W58 seal has a tighter fit on the driveshaft.

 

[shipkiller]

I had to replace the rear housing of the R154 because the "bushing" part of it was fucked.
Along with a new seal and a new DS

 

[shipkiller]

Bad news, the bushing that is pressed in the extension housing failed again, with another DS, leading to oil seals leaking. There is play now when I move the yoke (1-2mm).

Should I source another extension housing ($$) or order a omega R150 tailshaft bushing (http://www.omegamachine.com/db/R150 Transmission Parts.asp)(Is the R150 yoke similar in OD to the R154?).

Also: Why do I keep wearing out that bushing so quickly? I addressed every factor: Outputshaft bearing, the bushing, the Driveshaft and the center bearing, the gearbox alignement, the Ds alignment.

I understand it is not common for the R154 to wear that part as I'm one of the first.

 

[Poodles]

Yep, you have some other issue causing the failure...

 

[shipkiller]

Yes but what.
Can you throw a hint or something. This is driving me insane

 

[celica1g]

Bad news, the bushing that is pressed in the extension housing failed again, with another DS, leading to oil seals leaking. There is play now when I move the yoke (1-2mm).

Should I source another extension housing ($$) or order a omega R150 tailshaft bushing (http://www.omegamachine.com/db/R150 Transmission Parts.asp)(Is the R150 yoke similar in OD to the R154?).

Also: Why do I keep wearing out that bushing so quickly? I addressed every factor: Outputshaft bearing, the bushing, the Driveshaft and the center bearing, the gearbox alignement, the Ds alignment.

I understand it is not common for the R154 to wear that part as I'm one of the first.

hey mate sorry to jack ur thread but what did you end up doing because im in the same boat !!!! was just quoted 560$$ for extension housing ??

 

[shipkiller]

A used R154 extension housing with the "bushing" In good shape.
Stock Driveshaft (my 1 piece is toast'd) with new carrier bearing.
new outputshaft seal and outputshaft bearing.

it has been fine since that moment