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what type of oil is recommended, and how many quarts? what oil filter?
what type of oil is used in the geared hubs?
what exactly does the TT4 system do?
thanks guys!
any help is welcome here...
what type of oil is recommended, and how many quarts? what oil filter?
what type of oil is used in the geared hubs?
what exactly does the TT4 system do?
thanks guys!
any help is welcome here...
Quarts - 8 with filter.
Oil Filter - Delco PF-1218
Geared Hub Oil - Gear Oil. I use Lucas Hub Oil (when I know I'm doing heavy 4 wheeling) or a Synthetic 75w90 Gear Oil (when it's mostly street).
TT4 - Stands for TorqTrac4. Long story short:
Differentials in an H1 utilize a Torsen (Torque Sensing) worm gear based limited slip differential. This type of setup will "lock" the differential axle shaft sides up to a specific bias ratio to maintain traction. Once beyond that bias ratio, it will unlock and allow one axle to spin more or less than the other one
H1's that didn't have ABS have a 4.5:1 bias ratio, where one side will have 100 units of power, and the other side can have up to 450 units of power before the differential will "differentiate".
To fool the Torsen into being locked, you can lightly apply brake and throttle at the same time. This is known as BTM, or Brake Throttle Modulation.
Well, ABS forced AM General and Gleason Zexel (MFG of the Torsen) to lower the bias ratio. The lower bias ratio forces the ABS computer to do BTM for you. It detects wheelspin and then applies brakes to fool the Torsen into moving the side that isn't spinning.
Hardcore off roaders hate it. It works, but most people that really off road their trucks put in a Detroit, Auburn, ARB, or Eaton locker.
1997.5 HMC4 Hummer H1 w/Slantback shell (Mine)
2006 Hummer H3 Adv. Package (Wife's)
M101A2 Trailer
Hardcore off roaders hate it. It works, but most people that really off road their trucks put in a Detroit, Auburn, ARB, or Eaton locker. </div></BLOCKQUOTE>
Notice my sig?
TT4 will work for about 90% of offroad needs, which just about leaves out every fun obstacle in Moab that requires a "no-spin" technique. The TT4 is considered a 'reactive' system, whereas the BTM and locked trucks use a 'proactive' approach.
Dave
1999 AMGeneral H1 6.5TD BLACK Wagon e-Lockers Front and Back, Rubberduck4x4 RockTubes, Extended Undercarriage Protection,"Big Duck" 2" body lift/2 1/2" suspension lift, 41" IROK Radials on 17" Cepeks w/Rock Rims, (in process)Centered front diff, 3.08 gears, 12k Brakes and 12k halfshafts
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