Which differential oil?
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Joined: Jun 2003
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From: Virgin Islands
Which differential oil?
I got a 98 F150 4.6 4R70w trans w/ 8.8 and 85,000 miles on it. I live in the carribean where the temp is always above 80 and the roads are very rough and hilly. I'm doing a complete fluid change on my truck; flushing the brake fluid, transmission including torque converter. I also need to change the fluid in the rear end. I just recently had my bearing changed and they put 85-140 in it with a GM rear additive(haven't figured that one out yet). So i wanted to know which would be better the richmond GL-6 which is a 30w oil i believe or the Royal Purple GL-5 which is a 10w? Both are 75-140.
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Senior User
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From: Virgin Islands
I do like the redline product but so far I have been unable to find a 75 140 oil they make an 85-140 and a 75 90. I use their water wetter and it works well. One thing I fotgot to add is that I live in the islands. SO the only parts store here is a western auto. I will be ordering this stuff from someone and having it sent by boat to me from miami.
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http://mechanicmasters.com/catalog1/...0_products.htm
http://www.autochic.com/redline/gear.html
http://www.247-parts.com/leyline/redline_oil_gear.shtml
All show the 75w140...remember to order the friction modifier...one 4oz bottle for the rear-end.
Hope that helps...good luck!
http://www.autochic.com/redline/gear.html
http://www.247-parts.com/leyline/redline_oil_gear.shtml
All show the 75w140...remember to order the friction modifier...one 4oz bottle for the rear-end.
Hope that helps...good luck!
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Joined: Jan 2000
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From: Metro Detroit (Redford)
Originally Posted by cptslewis
I do like the redline product but so far I have been unable to find a 75 140 oil they make an 85-140 and a 75 90. I use their water wetter and it works well. One thing I fotgot to add is that I live in the islands. SO the only parts store here is a western auto. I will be ordering this stuff from someone and having it sent by boat to me from miami.
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Senior User
Joined: Jun 2003
Posts: 131
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From: Virgin Islands
Actually I just ordered the 75-140 last night from the mechanics site that was posted above. I still had to send it to miami for it to go on a boat to get to me but thats fine. I also ordered some water wetter. I already have the ford friction modifier as well so hopefully Ill be able to change it out in a couple of weeks.
