Vn vp vr vs v6 v8 holden commodore torque lock lsd truetrac alternative m78 diff. If this is your first visit, be sure to check out the faq by clicking the link above. At west coast differentials, we have been diagnosing, repairing and upgrading axles and differentials since 1982. However, if there is any side or end play in the pinion or carrier bearings, then attention is needed. Just recently finished a ground up resto, have noticed when i put the foot down after backing off and vice versa i can hear a definate clickclunk in the rear end area. Hey guys, had abit of a look around on the net with no luck. Gm 12bolt units are all fivecut, but both styles are available for 8. In mechanical engineering, backlash, sometimes called lash or play, is a clearance or lost motion in a mechanism caused by gaps between the parts. Pulling the diff out of the axle housing and checking the play is be pretty simple.
I have just done a search on driveline backlash and to me it seems that alot of people are saying that alot of backlash is normal due to the many gears involved in the gearbox, transfer case center diff. Well known automotive writer jim allen and differential guru randy lyman, of randys ring and pinion, teamed up to create a stunningly complete book. Churchills pocketbook of differential diagnosis, 3e churchill. Were confident we can help with your diagnosis, and we can also provide you with the parts needed to fix it. Replacing a differential carrier, changing bearings or a ring and pinion can be a challenging process. My eb has a shirtload of backlash in the diff and at slow speeds this is a bit annoying as you can feel it take up and somewhat bunnyhop. Discussion in defender 90 110 started by jolly77, jun 29, 2008.
Backlash is defined as the space between the thickness of a gear tooth and the width of the space between teeth in the mating gear, designed to allow for a film of lubricant, binding from heat expansion and eccentricity, or manufacturing inaccuracies. How to rebuild gears in chevy and gm differentials. Diagnosing differential problems west coast differentials. This is true but i disagree that this is what people can feel when checking there backlash.
Each chapter in the book is headed by common differentials youll meet in the clinical setting. Or would you say not to do it yaself and take it to a pro ie does it take abit of practice and experience to do it right or is there ways i. Again the best place to find out the recommended backlash setting is from. So ive been reading a few books, speaking to a few diff shops and. Bought this tool for setting backlash on a chrysler 8. Have new uni joints, new wheels, new axles en36 steel, diff was overhauled did they get the preloadbacklash right. In this video tool girl sam gives me a hand setting the backlash between the crown wheel and pinion gears a critical clearance, too little and. Orders favourites wishlists edit my details edit my address book login. If you re on a budget you can just weld a 36mm axle nut to a socket and use that with. Determine side gear bearing preload first, then adjust backlash by adding or removing shims from one side to the other or by adjusting center carrier bearing nuts from one side to the other until the desired backlash is obtained.
The most comprehensive diff gear install vr v6 turbo commodore m78 part 2 duration. Ill be using an irs diff out of a vz m80 as an example. Most of the backlash is probably from end play in the differential gears. Now there will be a few pieces of information i will tell you to get from other sources. It can be defined as the maximum distance or angle through which any part of a mechanical system may be moved in one direction without applying appreciable force or motion to the next part in mechanical sequence. Now the diff is just the standard open center for the e series. Spring loaded to adjust to the size you need, works great for all arb adjuster rings, as well as all 9 inch adjuster rings, and. Be sure to follow the correct backlash spec for the type of gears you have. Give our tech and sales experts a call at 800 5100950 and well be happy to help.