loco
08-28-2004, 09:46 PM
Everytime I put my truck in reverse after it's been sitting or turned off I feel a pop that feels like its coming from the rear end. Anyone else feel this? I'm going to call my dealer on mondy.
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snoman 08-29-2004, 08:44 AM It could be the slip yoke on the rear drive shaft binding and needing some lube. GMC2500HD 08-29-2004, 05:30 PM Mine did the same thing, I took it in and they fixed it. Not sure what they did but it does not do that anymore... Good luck loco 08-31-2004, 12:55 AM yeah I have to take mine in soon. When i have the time. dmaxalliTech 08-31-2004, 10:34 AM what year truck is it? Cab and bed config? loco 09-01-2004, 01:38 AM 04.5 crew cab short bed _nar_ 09-02-2004, 08:32 PM My dad's truck is the same config as loco's and sometimes when he stops, before he shifts to park, it will suddenly clunk and feel like someone rearended him. Same thing or something else? Mine has never done that yet and it has more miles than dad's. ockgator 09-04-2004, 01:59 AM Most likely slip yoke bind up. GM has a special blue grease you can put on splines, be warned though... the stuff is pricey. Believe this problem started cropping up in the mid 80's.Pull shaft and clean splines with brake clean, lube it up and all fixed, may have to reapply once in awhile loco 10-02-2004, 10:53 PM hmmmm, looks like its time to take mine in. Pappajo 10-03-2004, 07:43 AM Mine does the occasional pop, but not all the time. did they give you a specific reason for the pop. _nar_ 10-03-2004, 04:52 PM Been reading some other stuff and it seems that the thing my dad's truck does is actually just shifting to first. If you stop really fast and the allison hasn't gotten into first before you stop moving it still shifts down into it and I think that is the surge that we have felt on his truck. I've gotten mine to do it once when I rammed on the brake. Neither truck has a two piece driveline so it shouldn't be the driveline. The slip yoke in the transmission shouldn't need greased since it runs in atf. I also have a friend with an 8.1/allison truck and he says his does it all the time when decellerating quickly at stop signs. It seems maybe mine just learned to get downshifted quicker than his or dad's maybe.. Either way now that I think it's just the allison shifting I'm not going to worry about it. Hope this helps some of you guys that have a surge and not a pop... | ||