TH400 rebuild tech
(→Boost valve modification) |
m (→Boost valve modification) |
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===Boost valve modification=== | ===Boost valve modification=== | ||
| − | Modification of the boost valve to have static line pressure and vacuum modulator replaced with aluminum plug. | + | Modification of the boost valve to have static line pressure and vacuum modulator replaced with aluminum plug. This modification of the boost valve avoids the run away high line pressure in reverse. |
Grind a flat spot on the large spool valve land with arrow pointed at it. It is not fussy, 1/4 to 3/8 inch wide is fine | Grind a flat spot on the large spool valve land with arrow pointed at it. It is not fussy, 1/4 to 3/8 inch wide is fine | ||
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[[file:400boost03.jpg]] | [[file:400boost03.jpg]] | ||
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| + | After the boot valve modification, you can install an aluminum plug that blocks the modulator valve in place. | ||
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| + | [[file:T-400_modulator_plug.jpg ]] | ||
=Valve body mods, automatic shifts= | =Valve body mods, automatic shifts= | ||
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