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Old 09-28-2003, 07:08 PM
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replacing pump seal on 700R4

I have a leak on a 700R4. It appears to be leaking from the front pump bolt at the bottom. To replace the seal do I just take out the bolts , replace the gasket? Is there any surprises? No bolts will fall out..... ( my luck probably )

When I`m there how do I check the pump?

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Old 09-28-2003, 07:35 PM
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If you stand the trans on end (tailshaft down of course) you can remove the bolts, then remove the pump, you will need a puller, you can make one from a short piece of chain and two suitable bolts, once you remove the pump, replace it with a rebuild, this is too much work to have to do in a couple more months if the pump dies, (common on early pumps). there is a paper gasket on the case and an O-ring on the pump,also a seal on the input part of the pump, most have a steel cage around them to help retain the seal (they have a nasty habit of blowing out).
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Old 09-28-2003, 08:41 PM
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I really don`t know if I want to screw with this leak. My motor is around 400 hp, this tranny lasted about 2 weeks until this leak started. I am seriously considering throwing is a T-350....Summit sells them for $700. If I go ahead and fix my 700r4 on my own it`ll break with the power that I have AND I`m going to toss on some Nitrous so this 700r4 project is really making me think....

Should I just throw on a T350 or play with the 700r4???????
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Old 09-28-2003, 09:27 PM
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Quote:
Originally posted by BOBCRMAN@aol.com
If you stand the trans on end (tailshaft down of course) you can remove the bolts, then remove the pump, you will need a puller, you can make one from a short piece of chain and two suitable bolts, once you remove the pump, replace it with a rebuild, this is too much work to have to do in a couple more months if the pump dies, (common on early pumps). there is a paper gasket on the case and an O-ring on the pump,also a seal on the input part of the pump, most have a steel cage around them to help retain the seal (they have a nasty habit of blowing out).

========== hopefully you perform all of that after removing the tranny pan, then pull the filter, unbolt the converter solenoid, pull out the tube feeding the rear aux valve body (if equiped)....

then pull the pump after it is unbolted.
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