Ynt: 1977 CJ5'in A'dan Z'ye Yeniden Doğuşu
Selamlar Arkadaslar,
Goktug Z kollarini takmaya karar verirsem mutlaka yapim asamasi ve uygulamasiyla birlikte resimleri İns. en yakin zamanda ekliycem.
Arkadaslar benim Cevy V8 in standart 44 dana diye satin aldigim suan aracta takili bulunan defransiyelin intten detayli arastirmalarim sonucunda 44 dana degilde 8.5'' 10 bolt oldugu ortaya cikti defransiyel disli orantilarini anlamadigimdan dolayi resmini ve ingilizce aciklamasini ekliyorum bu konuda bilgisi olan Arkadaslardan Ricam benim ve benim gibilerin anlayabilecegi sekilde detayli aciklama yazmalaridir ornegin serimidir yoksa arazi uyumlumudur kac '' lastikler takilabilir gibi genel 1 bilgi ilerde zaten defransiyelin kapagi sokup disli oranini mutlaka sayacak ve ona gore daha saglam bilgiye ulasacagim suanki arastirmam sadece defransiyelimi tanima ve Bilgi sahibi olabilmektir.
Bu resimlerde bendeki defransiyel ondeki orjinal CJ 5 in ustunden cikan arkadakide yeni takilan defransiyel.
A multi-functional and readily available alternative to the 8-7/8'' GM 12-bolt
Many classic car and muscle car enthusiasts are looking for a differential that can be easily adapted for daily use, improved fuel economy or for racing. With the costs of Ford 9-inch third members and GM 12-bolts escalating, there are several low-buck alternatives still plentiful at your local salvage yard. The later model GM 8.5-inch 10-bolt differential is just such an option. The 8.5-inch 10-bolt was used in cars and trucks over a wide range of years. First appearing in the 1970 as a corporate replacement for the 10-bolt 8.2-inch or the 12-bolt 8.875-inch, the 8.5-inch 10-bolt was used in many different models by every GM division, with the exception of Cadillac, during the 1970s. Other than its abundant supply at your local salvage yard, another benefit of the 8.5-inch is that carriers and gears are easily interchangeable. Original gear ratios range from 2.41:1 all the way up to 4.10:1 in some pickups. All possible differential ratios above 2.73:1 can be swapped without having to change carriers (except for the truck differentials with 30-spline axles). The 8.5-inch will withstand some abuse; it shares the same pinion shaft diameter as the more expensive 12-bolts. Ten-bolt rears came in both Positraction and non-Positraction versions. Although it would be much cheaper to find one with Positraction already, many aftermarket suppliers can sell you carriers, axles and gears to convert a stock non-limited-slip axle to a Positraction.
Positraction rearends will usually have a tag on the right lower cover bolt with a two- or three-digit axle code and/or production date. Rearends with open differentials usually have a tag located on the left lower cover-mounting bolt. Inside the differential cover, the ring gear will be marked with tooth counts such as 10,41 for 4.10:1, and so on. The 10-bolt differential cover is located on the rear of the axle and is an 11-inch x 10.25-inch oval. An important thing to note is that the ring gear bolts are .4375-inch left-hand thread on all 8.5-inch differentials. GM did make another 10-bolt axle for earlier cars that has a similar size and shape cover, but this axle has only an 8.2-inch ring gear and does not interchange. Another 8.2-inch axle was built for B-O-P applications and is commonly found in earlier GM mid-size cars. The 10-bolt, 8.2-inch differentials use .375-inch right-hand thread bolts in the ring gear. The 8.5-inch pinion diameter is 1.625 inches, whereas the 8.2-inch is smaller at 1.435 inches.
The 8.5-inch is often referred to as the "GM corporate 10-bolt" because of its multiple uses, and the 8.5-inch is a semi-float axle, meaning it has only one axle bearing per side, mounted inside the axle tube. The reliability of the axle tube and bearing are really the only problem spots you are likely to encounter with the 8.5-inch rear end. The axle tube is thinner (.3125-inch thick) than that in the 12-bolt, and the axle bearing is probably the weakest link of this rearend assembly.
When searching through your local salvage establishment, an easy way to check if you have located a Positraction rear is to jack up the rearend and put the car in neutral (block those front wheels, too). Have someone else hold one rear wheel while you attempt to turn the other yourself. If you cannot turn the wheel on your side while the other wheel is held in place, then the axle is a Positraction. If you can turn the wheel, it is a non-Positraction rearend. Original gear ratios were 2.41:1, 2.56:1, 2.73:1, 3.08:1, 3.43:1, 3.73:1 and 4.10:1. You can find a 10-bolt 8.5-inch differential in any of these cars or trucks:
1971-'76 Chevrolet full-size cars
1994-'96 Impala
1971-'81 Buick full-size cars
1973-'77 Buick Gran Sport
1972-'77 Pontiac GTO and Le Mans
1970-'81 Chevy Camaro and Z28
1970-'81 Pontiac Firebird
1971-'77 Olds Cutlass and F-85 and Pontiac Grand Prix
1971-'79 Chevy II, Nova, Buick Skylark and Olds Omega
1973-'77 Chevelle, Malibu and El Camino
1971-'77 Pontiac Ventura and Phoenix
1971-'81 Pontiac Bonneville
1973-'77 Monte Carlo
1973-'77 Buick Apollo, Regal and Century
1980-'94 Chevy ½-ton and ¾-ton pickups
1977-'94 GMC Jimmy and Chevy Blazer
A 10-bolt front axle was used on GM 4WD vehicles as well. It was available in three ring gear choices. Axle codes were GU6 (3.43:1) GT4 (3.73:1) and GT5 (4.10:1). You can find a front 10-bolt in these trucks:
1977-'87 K and V-series half- and three-quarter-ton Chevy pickups
1977-'91 Jimmy and Blazer 4WD
1988-'97 K1500 and K-2500 pickups
We have made a list of axle lengths available to subscribers on the Parts Locator page of our Web site, www.hemmings.com. This chart will help you find what axle lengths are compatible between years and body styles.
Checking around with local used parts suppliers, we discovered that you could buy an empty 8.5-inch housing for between $150 and $250. Complete rear axle assemblies will cost anywhere from $350 to $500. So, if you cannot find or cannot afford a 12-bolt Positraction, it is good to know there are readily available alternatives that could be substantially cheaper. You can start by converting to the 8.5-inch in a weekend, and then upgrading the internal parts, such as adding a Positraction carrier or beefing up the ratio on a subsequent weekend, when time and/or money permits. With the availability of numerous ratios, you can use this differential for multiple use options while still keeping the same rear axle assembly.
Saygilarimla,
Ali Gulcer.