The ZF 4hp22l is quite different than what you probably had in your b230. They are quite solid, as long as you don't rev the engine in P or N. You could retrofit an external AT cooler for insurance. Do not fit an external filter as the ZF reverses its external flow during lockup engagement.
When towing do not neglect to maintain the brakes in tiptop condition.
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1985 744 gle d24t
1985 745 gle d24t
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