Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? September 29, 2013, 06:23:06 PM I have an 88 XR7 with the stock 3.08 and rear drums. Been thinking about pulling the rear axle off a 87 TC with AOD in the local pick-n-pull yard. The yard is asking $65 for the entire axle with discs. Here's a picture of the potential doner:I've got the tools and the skills to swap so no problem there. I would probably keep my 10" drums based on the chatter in this post (yes, discs are shagier but I don't want to go through the brake conversion when my factory drums are fine for me): http://www.foxtbirdcougarforums.com/showthread.php?35944-Turbo-Coupe-axle-with-drums&highlight=turbo+axleSo, is the TC the more desirable axle? Will the 3.73 offer a noticeable difference in performance?Appreciate your thoughts on the topic. Quote Selected
Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? Reply #1 – September 29, 2013, 06:32:11 PM That's a pretty good deal for the whole axle. Without knowing anything else about your combo, I would say it will be a nice increase in acceleration. Why not use the discs and upgrade braking at the same time? Quote Selected
Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? Reply #2 – September 29, 2013, 08:13:29 PM Grab it !!!! Awesome swap for super cheap. Grab the parking brake cables and quads as well. Leave the shocks connected. They look new. Quote Selected
Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? Reply #3 – September 29, 2013, 09:48:28 PM Another thought is just get a set of 3.73 gears and have them installed in your rear. Yes it costs more but if the Traction-Lok in the TC rear is bad you'll have to rebuild it, costing more money. Quote Selected
Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? Reply #4 – September 29, 2013, 10:49:54 PM Grab the quad shocks and mounts off the turbo coupe too.. Quote Selected
Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? Reply #5 – September 29, 2013, 11:04:52 PM I drove 206 miles today andvi still have 3/4 tank of gas.my station wagon with the same engine, same transmission and a bit more weight with 3.55 gears would barely touch 20mpg.if you cruise freeway a lot, I wouldn't do it. if you only play on the weekends and want to race, go for it.my 2 cents. Quote Selected
Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? Reply #6 – September 29, 2013, 11:16:26 PM 7.5<8.8 swap it and dont look back.... Quote Selected
Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? Reply #7 – September 29, 2013, 11:28:09 PM being an 88 car, there is a chance he already has a 8.8. Quote Selected
Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? Reply #8 – September 29, 2013, 11:45:46 PM Quote from: Haystack;422632being an 88 car, there is a chance he already has a 8.8.Yes, my 88 XR7 has the 8.8 with Traction-Lok and the rear quad shocks from the factory. Quote Selected
Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? Reply #9 – October 01, 2013, 04:44:08 PM Buy it for $65 and sell it to a Mustang guy for $200.Darren Quote Selected
Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? Reply #10 – October 02, 2013, 01:06:59 AM Quote from: Aerocoupe;422727Buy it for $65 and sell it to a Mustang guy for $200.Funny!However, for the price I'm thinking of removing that 3.73 pinion and carrier for a later swap into my 8.8. Just need to determine what my engine RPM will be at highway speeds before I commit. I've found a few good RPM/Gear calculators including this one:http://www.differentials.com/technical-help/differential-gear-ratio-calculator Quote Selected
Opinions Wanted: Swap XR7 3.08 Axle for TC 3.73? Reply #11 – October 02, 2013, 10:29:57 AM Mine seems around 2500-2600 ish. AOD. Quote Selected
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