Hi guys!
So, I took my car to get the rear end checked out. He wanted to charge me to take off the housing to check the gears, but I just had him check to see if it was an open carrier. I hope that's the right terminology...anyways, it seems to be a limited slip, so can I go from 3.93 to 3.36 without changing anything but the ring and pinion? I can't seem to find 3.36 anywhere even at Randy's Ring and Pinion. Any suggestions?
Linda
PS. Also, the guy said that Randy's Ring and Pinion can get 3.55, but that's still a little too stiff for me. He said that they can modify a Chevy gear, but you would have to change out the yolk, yadda yadda yadda. It would be three times as much.
Hi Linda. You're doing the right thing. A 3.36 gear is perfect for your '67. It was the standard ratio for automatic trans GTO's in '67. Good power, good acceleration, decent fuel mileage/cruising at highway speeds. A 3.36 is as "long'legged" as you can go with your 4-series carrier. I know. I did the same change. I was able to locate a set of original, used gears for mine. The ring and pinion on these cars almost never wore out, so you should be able to find a matched set of good used gears. I would NOT go 3.55 with your car......with the automatic, you'll be sucking fuel and revving high at freeway speeds. Good luck, and if I come across any 3.36 gearsets, I'll let you know asap.
Jeff
Hi guys!
So, I took my car to get the rear end checked out. He wanted to charge me to take off the housing to check the gears, but I just had him check to see if it was an open carrier. I hope that's the right terminology...anyways, it seems to be a limited slip, so can I go from 3.93 to 3.36 without changing anything but the ring and pinion? I can't seem to find 3.36 anywhere even at Randy's Ring and Pinion. Any suggestions?
Linda
PS. Also, the guy said that Randy's Ring and Pinion can get 3.55, but that's still a little too stiff for me. He said that they can modify a Chevy gear, but you would have to change out the yolk, yadda yadda yadda. It would be three times as much.
Linda, let me know how you make out with your gear change. I'm thinking of going to 3.55s from my 3.90s. Also, let me know what it cost you. Rukee told me that the parts are about half of the $400-$500 total cost, in his estimation. Regards, Paul
Hi Linda. 450 probably is accurate. It may be cheaper to find another entire rear end assembly and swap it in. You may be able to find a '66-'72 ten bolt safety-trac (posi) for around 400 dollars in a 3.36 ratio. A very easy, low tech job. You could ebay your 3.93 posi and more than make out. (steeper geared rear ends bring more $$). Sandu: 3.23 gears WILL NOT work in Linda's 4-series carrier. The lowest numerical ratio she can use is a 3.36 if she just changes the ring and pinion.
Jeff
I don't know about where you guys live, but they wanted $450 in labor + parts! I don't know why, maybe they're trying to take advantage of Blondie67 because I am blond? Some places even quoted me as high as 1600 to do the job. I'm about ready to call this old guy that has had a shop for years and have him do it. He probably knows old cars inside and out and has been doing them for 60 years. He'd probably only charge me $100....
Linda
I changed my own gears and it took about two hours. That included time NAPA took to press on the new bearings onto the pinion gear and carrier assembly. My labor rate must be waaayy too low or somethin. At my shop you`d get that done parts and labor, job done for that amount. Keep looking IMO.
AutoForums.com is the premier network of enthusiast-owned
enthusiast-operated automotive communities.
We operate more than 100 automotive forums where our users consult peers for shopping information and advice, and share
experiences and opinions as a community.
Some places even quoted me as high as 1600 to do the job. I'm about ready to call this old guy that has had a shop for years and have him do it. He probably knows old cars inside and out and has been doing them for 60 years. He'd probably only charge me $100....
Linear Mode
