Swapping out a TH350 for a TH700R4
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*The overdrive transmission is longer than a TH350 that has a 6 inch tail housing. A TH350 with a 9 inch tail housing is similar in length to the TH700R4. | *The overdrive transmission is longer than a TH350 that has a 6 inch tail housing. A TH350 with a 9 inch tail housing is similar in length to the TH700R4. | ||
*The 4x4 output shaft of the TH700R4 is longer and requires a shaft change to a custom shaft from Advance Adapters. | *The 4x4 output shaft of the TH700R4 is longer and requires a shaft change to a custom shaft from Advance Adapters. | ||
| − | *Crossmembers must be moved (usually for RWD applications; some vehicles e.g. 1973-87 Chevrolet/GMC C/K (also 87-91 R/V series e.g. K5 Blazer, Jimmy, Suburban, crew/chassis cab) with 4 wheel drive can retain the stock crossmember location (transmission adapter to transfer case must match the transfer case bolt pattern; 700R4 made optional 1982-91). | + | *Crossmembers must be moved (usually for RWD applications; some vehicles e.g. 1973-87 Chevrolet/GMC C/K (also 87-91 R/V series e.g. K5 Blazer, Jimmy, Suburban, crew/chassis cab) with 4 wheel drive can retain the stock crossmember location (transmission adapter to transfer case must match the transfer case bolt pattern; 700R4 made optional 1982-91; Advance Adapters does manufacture a transmission adapter if converting the THM400 to a 700R4/early 4L60E when mated to the stock THM400 transmission adapter which also includes a 32 splined output shaft (or swap out the input gear on the transfer case with 27 splines). |
*Drive shaft lengths (4x4) may need changed depending on the truck configuration (if using non-stock transfer cases e.g. NP205 in place of an NP241 and/or driveline swaps e.g. Jeep 4.0L to 700R4 and/or Chevrolet powertrain to existing transfer case (Jeep, Land Cruiser) - 700R4 transmission adapter to transfer case has a THM350 bolt pattern but thinner to compensate for the 700R4 and early 4L60E prior to the introduction of the 2 piece case/bolt on bellhousing (1996+ 4L60E has a 2 piece bellhousing and six bolt tailhousing). | *Drive shaft lengths (4x4) may need changed depending on the truck configuration (if using non-stock transfer cases e.g. NP205 in place of an NP241 and/or driveline swaps e.g. Jeep 4.0L to 700R4 and/or Chevrolet powertrain to existing transfer case (Jeep, Land Cruiser) - 700R4 transmission adapter to transfer case has a THM350 bolt pattern but thinner to compensate for the 700R4 and early 4L60E prior to the introduction of the 2 piece case/bolt on bellhousing (1996+ 4L60E has a 2 piece bellhousing and six bolt tailhousing). | ||
*You need to hook up the wiring to the TH700R4 transmission to have converter lockup control. There are several kits available from simple to road speed adjustable designs, or the wiring can be done from scratch. | *You need to hook up the wiring to the TH700R4 transmission to have converter lockup control. There are several kits available from simple to road speed adjustable designs, or the wiring can be done from scratch. | ||
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