jc64
05-23-2008, 11:52 PM
ZF-6 GENERAL INFO
ZF-6 Heavy Duty 6 speed manual transmission has an aluminum alloy main gear case and tail housing with the bell housing integral to the case. The ZF-6 is built in both a 2 wheel drive and 4 wheel drive versions with a diesel design only.
ZF first introduced the S6-650 in 1998 on the Ford Super Duty and compatible stripped chassis’s. GM started using the ZF-6 in 2001 with some improvements making this 6 speed transmission different from the Ford version.
All gears in the ZF-6 are synchronized with a dual cone synchronizer in 2nd and 3rd gears. The ZF-6 has a an internal oil pump to circulate and cool the lubricant which is unique to a manual transmission.
Also, see link at end of page.
Official Identification Number:
ZF S6-650
ZF = Manufacturer - ZF Industries
S = Fully Synchronized in all 6 gears and reverse
6 = 6 Speed
650 = Model number
GM RPO:
ML6
Gear Ratios:
Reverse - 5.23
1st - 5.79
2nd - 3.30
3rd - 2.10
4th - 1.31
5th - 1.00
6th - 0.72 (O.D.)
Specifications:
Max. Input torque: 520 ft./lbs. (ZF and GM raitings)
Weight: 4x4-233 lbs., 4x2-241 lbs. (weights with fluid)
Fluid capacity: 6-liters (6.340129 quarts)
All GM GMT560 and GMT800 Spec. Transmissions use (per ZF Industries):
GM Synthetic (P.N. 12378515)
or
Castrol Syntec Full Synthetic
or
Allison Transynd
Downloads from ZF Industries: ZF Literature (http://www.zf.com/na/content/en/north_america/corporate_na/products_services_na/replacement_parts_na/corporate_replacement_parts_us/light_trucks_replacement_us/service_portfolio_lcv_replacement_us/literature_lcv_replacement_us/literature_lcv_replacement_us.html)
ZF-6 Heavy Duty 6 speed manual transmission has an aluminum alloy main gear case and tail housing with the bell housing integral to the case. The ZF-6 is built in both a 2 wheel drive and 4 wheel drive versions with a diesel design only.
ZF first introduced the S6-650 in 1998 on the Ford Super Duty and compatible stripped chassis’s. GM started using the ZF-6 in 2001 with some improvements making this 6 speed transmission different from the Ford version.
All gears in the ZF-6 are synchronized with a dual cone synchronizer in 2nd and 3rd gears. The ZF-6 has a an internal oil pump to circulate and cool the lubricant which is unique to a manual transmission.
Also, see link at end of page.
Official Identification Number:
ZF S6-650
ZF = Manufacturer - ZF Industries
S = Fully Synchronized in all 6 gears and reverse
6 = 6 Speed
650 = Model number
GM RPO:
ML6
Gear Ratios:
Reverse - 5.23
1st - 5.79
2nd - 3.30
3rd - 2.10
4th - 1.31
5th - 1.00
6th - 0.72 (O.D.)
Specifications:
Max. Input torque: 520 ft./lbs. (ZF and GM raitings)
Weight: 4x4-233 lbs., 4x2-241 lbs. (weights with fluid)
Fluid capacity: 6-liters (6.340129 quarts)
All GM GMT560 and GMT800 Spec. Transmissions use (per ZF Industries):
GM Synthetic (P.N. 12378515)
or
Castrol Syntec Full Synthetic
or
Allison Transynd
Downloads from ZF Industries: ZF Literature (http://www.zf.com/na/content/en/north_america/corporate_na/products_services_na/replacement_parts_na/corporate_replacement_parts_us/light_trucks_replacement_us/service_portfolio_lcv_replacement_us/literature_lcv_replacement_us/literature_lcv_replacement_us.html)