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drive like you hate it.
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hi. im rebuilding a 1986 suburban trans for my 89 camaro. how do i rebuild the pump, and is it very difficult? i've overhauled a 700 before, but didn't touch the valve body or pump. the tv spring was broken and filled the pan with my new trans kit. also, which of the rebuild tools are absolutely needed? the input shaft seals and valve body seem to be the problems for me.
 

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empty h said:
hi. im rebuilding a 1986 suburban trans for my 89 camaro. how do i rebuild the pump, and is it very difficult? i've overhauled a 700 before, but didn't touch the valve body or pump. the tv spring was broken and filled the pan with my new trans kit. also, which of the rebuild tools are absolutely needed? the input shaft seals and valve body seem to be the problems for me.
A rear clutch spring compressor tool makes things easier. >>> https://www.700r4l60e.com/store/home.php?cat=63

Disassemble the pump and inspect for wear & scoring, check internal clearances, these are critical. Too loose = low pressure, too tight = binding parts when hot. Here's some pump Info for a 2004R which is basically the same for the 7004R trans. About 3/4 way down page >> http://www.ptsxtreme.com/faq/display_faq.asp?faq_id=4

If your pump has a lot of wear or scoring from metal/trash, I suggest a new rebuilt pump unless you have access to a lathe and accurate Mics.
 
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