TH700R4 through 4L70E tips and tricks
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[[Image:Stakebush.jpg]] | [[Image:Stakebush.jpg]] | ||
| − | ;{{Note1}} The #732 pump (manfactured since October 1986 which includes some early 4L60Es without the 2 piece bellhousing) has a cast in step to help retain the bushing. The early pump had an issue with the pump bushing walking out, requiring staking and/or Loctiting it in place. Also, the #732 pump has an additional oil drain hole which is a connection for the oil transfer tube used with the auxillary valve body. The early and late pumps do not interchange (same with the pre- and post-October 1986 transmission cases (the late 1988-1993 cases have a "St. Louis Gateway" arch casting and the absence of 3 oil pressure fittings). Some GM vehicles (GMT400 trucks, S10s and Astro/Safari vans after 1989, 1990/91 R/V series trucks (square body SUVs and crew cabs) came with a 40 tooth reluctor wheel where the speedometer drive gear is usually located - for older cable driven speedometers, the reluctor wheel can be swapped out. | + | ;{{Note1}} The #732 pump (manfactured since October 1986 which includes some early 4L60Es without the 2 piece bellhousing) has a cast in step to help retain the bushing. The early pump had an issue with the pump bushing walking out, requiring staking and/or Loctiting it in place. Also, the #732 pump has an additional oil drain hole which is a connection for the oil transfer tube used with the auxillary valve body. The early and late pumps do not interchange (same with the pre- and post-October 1986 transmission cases (the late 1988-1993 cases have a "St. Louis Gateway" arch casting and the absence of 3 oil pressure fittings). Some GM vehicles (GMT400 trucks, S10s and Astro/Safari vans after 1989, 1990/91 R/V series trucks (square body SUVs and crew cabs) came with a 40 tooth reluctor wheel (used with a speed sensor and a Digital Ratio Adapter Control (DRAC) module which is matched to the rear differential gear ratio) where the speedometer drive gear is usually located - for older cable driven speedometers, the reluctor wheel can be swapped out. Cable driven speedometers were used to 1990 (B-body) and 1992 (F-bodies) which had a hybrid speedometer gear and VSS housing. |
===Pump rotor clearance check=== | ===Pump rotor clearance check=== | ||
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