Hi i bought a 99 dodge ram 2500 with 84,000 miles, drove home great and when i got back i looked underneath and i noticed transmission fluid leaking from where the driveshaft meets the rearend and also where it meets the transfercase, any idea whats wrong and why it happened? Dealer said he was going to fix everything and it looks like he didnt even touch it. Could it be the pinion seals? Truck was originally from nh

 

And i also noticed tranny fluid or maybe p/s leaking from the front end under the radiator

 

the extension housing seal in the t-case is bad and if GEAR OIL, NOT TRANS FLUID IS LEAKING at the pinion on the rear end, your pinion seal is bad. both fairly simple

its trans fluid leaking at the radiator, likely a loose cooling line connection

 

I thought the pinion seal is a PITA to do?

 

attention to detail is all thats necessary to pull it off with out throwing too much of a fit

remove nut, remove flange, remove seal

 

i would also spend another few dollars and just replace the outer bearing and race while your there.....just a thought

 

the seal at the transmission/t-case is easy. just remove drive shaft and old seal, then tap in a new one, keeping it straight. use a good National brand seal from Advance or other, don't use a timken or it'll leak.

the pinion seal requires a lot more effort and as said - attention to detail, including an impact wrench to remove the big nut. do an internet search for the how to, but the right way is to measure the rotational force with an inch pound beam-style torque wrench, mark the nut and count the threads. replace seal and retighten nut to a smidgen past the old mark. check rotational force to be within spec.

if you can't do these, then at a minimum - check your fluids weekly.

 

If you just bought the truck, take it back to the dealer, and tell them to fix it. Make sure they are aware that you do NOT expect to have to pay for it.

 

ok thanks alot everyone its going in today and i also noticed a slight oil leak behind the harmonic balancer not leaking terribly just noticed some oil drips behind the HB. could it possibly be the seal too?

 

Yup. Not that bad to change.