I recently installed a Detroit Locker in the rear of my W150. It would clunk extremely hard when shifting into reverse with the factory open differential, so I installed this unit. I had a Dodge mechanic go over the pinion and bearings in the rear end, he checked them out thoroughly, said there was no need to tear into the pinion or bearings, as they were well within spec. Well, this new unit still has the exact same brutal reverse clunk. I also installed new superior axles. What is the fix for this? I assume it is the pinion bearing pre-load, Any help would be greatly appreciated.

 

sound kind of normal. i would guess it is the torque converter engaging since i am pretty sure there is no trans fluid being pumped when the truck is in park which is why it is bad to let these trucks idle in park.

 

I think if you adjust your 1st and reverse band in your trans it helps

 

i don't think it will. when i start my truck in neutral there is almost never a clunk into gear unless the truck is idling too high.

 

A misadjusted low/reverse band can cause harsh engagement along with engine idle speed too high, trans line pressure being too high or low, throttle linkage out of adjustment, and sticking accumulator/ broken accumulator spring.

 

Thanks for the input guys, I do always warm the truck up in neutral to get the juices flowing, as far as the accumulator spring, I don't know where to even start looking for this spring? There is very minimal drivehaft movement between park/reverse(1/8 of a turn)which is why I don't feel it is the rear end. I did set the bands up a bit during last tranny service, but have always had the brutal clunk. Please let me know where this accumulator spring is located?

 

there are lots of people that experience the clunk.
http://bit.ly/rDiE8D

 

Well, I think I will just put up with it. I feel something just isn't right, when compared to other Dodge trucks I have owned, I have never really noticed "the clunk", until this truck. My wife's daily driver, a 2001 1500 4wd, has 240 000 km on it, and is completely silent when shifting from park to reverse. This is why I was/am concerned, that being said, I will leave it for now. Thanks, everybody, for all the input , much appreciated.

 

Just to answer your question. The accumulator spring is inside the accumulator that is inside the transmission.