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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: aort07 on January 01, 2008, 08:03:27 pm

Title: 700R4 Pump Ears
Post by: aort07 on January 01, 2008, 08:03:27 pm

I pulled the transmission out tonight and found the ears were broken on the pump. What can I do to fix this? Can I put new ears on it and how?

Title: Re: 700R4 Pump Ears
Post by: VileZambonie on January 01, 2008, 08:16:17 pm

Replace the pump and converter. i promise you if you just put in a new pump gear it will break again. I've seen this 100's of times. When the sun gear cracks the housing will warp. Just get a reman pump and a new converter if it's been damaged. Go with a 13 vane pump

Title: Re: 700R4 Pump Ears
Post by: aort07 on January 01, 2008, 09:24:42 pm

This transmission has less than 4,000 miles on it off a rebuild. I got it from a respectable shop in Florida that has the 13 vane pump and all. It had a hardened sun gear and everything put in it. It didn't do a thing to the converter. I will call the guy that built it tomorrow and see what he says. Thanks for the advice.

Title: Re: 700R4 Pump Ears
Post by: 76_Scottsdale on January 02, 2008, 01:02:52 am

If the pump went then there will be junk in the converter. You will need a new one.

Title: Re: 700R4 Pump Ears
Post by: aort07 on January 02, 2008, 10:55:47 am

Wouldn't there be metal in the fluid? There was none, it was still nice and bright red like it was new.

Title: Re: 700R4 Pump Ears
Post by: werewolfx13 on January 02, 2008, 02:11:30 pm

Not necessarily, there can still be junk in the converter that you wouldn't see without slicing open the converter. You could try to use it, but theres a very good chance it will destroy the new pump.