TH700R4 through 4L70E tips and tricks
From Crankshaft Coalition Wiki
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*These transmissions use METRIC fasteners exclusively. | *These transmissions use METRIC fasteners exclusively. | ||
| + | *4L65E/4L70E will have 5 pinion planetary housings and 13 vane oil pump rotor - internal parts will retrofit into the non-electronic 4L60 and early 700R4. | ||
==Rebuild manual== | ==Rebuild manual== | ||
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[[file:700r4_servos.jpg]] | [[file:700r4_servos.jpg]] | ||
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| + | Not pictured is the 4L70E servo - which looks similar to the Corvette servo but with a slightly smaller diameter. | ||
== Pump modifications == | == Pump modifications == | ||
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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). | + | ;{{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). Also pump assembly from 4L60E (PWM (pulse with modulator) or non-PWM) does not interchange with nonelectronic 4L60 and early 700R4; oil pump gear (esp. the 13 vane pump from the later 4L65E/4L70E) and later design Teflon bushing will fit 700R4 pump. |
===Pump rotor clearance check=== | ===Pump rotor clearance check=== | ||
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===Speedometer/speed sensor=== | ===Speedometer/speed sensor=== | ||
| − | 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. | + | 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. This also includes the early 4L60E (1993-97) with the driver side VSS (some 1995 applications with the early design one piece case with the pulse width modulator solenoid (PWM) will have the VSS mounted on the passenger side similar to the 1996+ 2 piece case with bolt on bellhousing). |
==Pressures== | ==Pressures== | ||
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*[http://www.700r4transmissionhq.com/gm-automatic-transmissions/4l60e-identification/ 4L60E Basic Information] | *[http://www.700r4transmissionhq.com/gm-automatic-transmissions/4l60e-identification/ 4L60E Basic Information] | ||
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