700R4 Flexplate and Possible Rebuild Question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

8t5Silverado · 03-04-2005, 10:26 AM

I am going to pull my tranny to replace the flexplate. I don't know for certain that it is cracked, but I think that is the sound I am hearing (the flexplate rubbing on the inside of the bellhousing maybe).

My tranny slips a little and downshifts hard into 1st. My question is if I do find that my flexplate is cracked, should I:

a) replace the flexplate only and not rebuild the tranny, or

b) rebuild the tranny while I have it out of the truck (no small feat)

Also, what flexplate should I get for a stock 305 with 700R4. Summit has their own brand, B&M, and TCI.

What about 700R4 rebuild kits from Summit? Is $356 too much?

1986Silverado · 03-04-2005, 10:31 AM

Rebuild it while you have it out. My tranny rebuilder will build a 700r4 for 5-600 bucks with a mild shift kit and good parts. If you can rebuild it yourself then the summit kit would not be out of line. As far as flexplate, that would be a personal preference. By the way......I like your avatar I used to own one of those cars and will again someday

8t5Silverado · 03-04-2005, 02:17 PM

Cool...well if I could get it rebuilt for $500 or $600, I may not do it myself...I will check around.

I assume you had a Grand National and not the GSX. I had a plain old Regal in high school and came real close to trading it in on a 70 GS 455...wish I had done it.

1986Silverado · 03-04-2005, 05:00 PM

Yep, had a Grand National and T-Type. The GS 455 is a cool car to!

pedrofixlater · 03-05-2005, 06:33 AM

I was on ebay and found a great sight for ebuild kits for 700-r4 and 200-4r its oregan performence. Rebuild kit with steels and clutch discs for 105.00. On ebay just type 700-r4 and search.

03-04-2005, 10:26 AM	#1
8t5Silverado Mudslides 'r my specialty Join Date: Dec 2003 Location: STL Posts: 1,106	700R4 Flexplate and Possible Rebuild Question I am going to pull my tranny to replace the flexplate. I don't know for certain that it is cracked, but I think that is the sound I am hearing (the flexplate rubbing on the inside of the bellhousing maybe). My tranny slips a little and downshifts hard into 1st. My question is if I do find that my flexplate is cracked, should I: a) replace the flexplate only and not rebuild the tranny, or b) rebuild the tranny while I have it out of the truck (no small feat) Also, what flexplate should I get for a stock 305 with 700R4. Summit has their own brand, B&M, and TCI. What about 700R4 rebuild kits from Summit? Is $356 too much? __________________ Always on the lookout for old cars and parts...(20s, 30s, 40s, 50s, 60s, etc.) http://www.cardomain.com/memberpage/500339

03-04-2005, 10:31 AM	#2
1986Silverado What I drive Join Date: Apr 2004 Location: Star, MS Posts: 418	Rebuild it while you have it out. My tranny rebuilder will build a 700r4 for 5-600 bucks with a mild shift kit and good parts. If you can rebuild it yourself then the summit kit would not be out of line. As far as flexplate, that would be a personal preference. By the way......I like your avatar I used to own one of those cars and will again someday __________________ 1986 Chevy Crew Cab Dually(Choo-Choo Conversion) 2006 Chevy Equinox

03-04-2005, 02:17 PM	#3
8t5Silverado Mudslides 'r my specialty Join Date: Dec 2003 Location: STL Posts: 1,106	Cool...well if I could get it rebuilt for $500 or $600, I may not do it myself...I will check around. I assume you had a Grand National and not the GSX. I had a plain old Regal in high school and came real close to trading it in on a 70 GS 455...wish I had done it. __________________ Always on the lookout for old cars and parts...(20s, 30s, 40s, 50s, 60s, etc.) http://www.cardomain.com/memberpage/500339

03-04-2005, 05:00 PM	#4
1986Silverado What I drive Join Date: Apr 2004 Location: Star, MS Posts: 418	Yep, had a Grand National and T-Type. The GS 455 is a cool car to! __________________ 1986 Chevy Crew Cab Dually(Choo-Choo Conversion) 2006 Chevy Equinox

03-05-2005, 06:33 AM	#5
pedrofixlater 75 STEPSIDE Join Date: Mar 2005 Location: Suffolk, VA Posts: 92	I was on ebay and found a great sight for ebuild kits for 700-r4 and 200-4r its oregan performence. Rebuild kit with steels and clutch discs for 105.00. On ebay just type 700-r4 and search.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.