What gears came in a 88 sport 5.0L July 04, 2010, 09:46:38 PM I can't see the tag on the diff. With the aod cruising at 120 km per hour I see 2000 rpm in 4th or OD. My truck with 35" tires and 3:55 rear gears with a E4OD at 120 km per hour does 1800 rpm. Quote Selected
What gears came in a 88 sport 5.0L Reply #1 – July 04, 2010, 10:48:46 PM Check your door jamb stickerhttp://www.coolcats.net/tech/general/axleinfo.html Quote Selected
What gears came in a 88 sport 5.0L Reply #2 – July 04, 2010, 11:56:53 PM Generally, from what I've seen, the Sports usually have a 7.5 rear with traction lock and 2.73's. Quote Selected
What gears came in a 88 sport 5.0L Reply #3 – July 05, 2010, 01:50:36 AM I would say you have either 2.73's or 3.08's. That is about the same RPM's as my car at 75mph, somewhere between 1800 or 2000rpm's. I have slightly taller tires then stock, and I am unsure which ratio I have, probably 2.73's, but the car does have the larger 10" drums and a towing package, so I will have to check on of these days. Quote Selected
What gears came in a 88 sport 5.0L Reply #4 – July 05, 2010, 10:31:19 AM Quote from: Haystack;327330I would say you have either 2.73's or 3.08's.Likely since those are the ONLY two ratios that were available... Quote Selected
What gears came in a 88 sport 5.0L Reply #5 – July 05, 2010, 02:49:35 PM Hey, they could have been swapped at some time down the road. I doubt you 'could tell which gear you have without watching a tach at a certain MPH. I'll just vote 2.73's since I can't be right by saying both. Quote Selected
What gears came in a 88 sport 5.0L Reply #6 – July 05, 2010, 09:09:47 PM I did the mark on the driveshaft and mark on the tire. 2 3/4 turn of the driveshaft to one turn of the tire. 2:73. Thanks guys. Quote Selected
What gears came in a 88 sport 5.0L Reply #7 – July 05, 2010, 09:18:26 PM you could of looked at the tag on the rear and see that it said something along the lines of 2L73 Quote Selected
What gears came in a 88 sport 5.0L Reply #9 – July 05, 2010, 09:22:58 PM well thats just wrong..... Quote Selected
What gears came in a 88 sport 5.0L Reply #10 – July 05, 2010, 09:31:41 PM Bettin' someone had to replace the Trac Loc and either forgot, or were too lazy to put the tag back on... Quote Selected
What gears came in a 88 sport 5.0L Reply #11 – July 05, 2010, 09:37:15 PM I am thinking that because the limited slip works really well. I have a 88 TC rear with 3:73 gears and the disc brake in my garage and I am wondering if it will be too much for the 351w. I may see if I can find a 3.08 8.8" or a 3.27 8.8" diff and swap the disk brakes over. Quote Selected
What gears came in a 88 sport 5.0L Reply #12 – July 06, 2010, 12:11:45 AM What size tires are you running or planning to run?Depending on that, 3.73 may be fine, unless you drive a lot on the highway and have a c4 or c6. I think you'd be fine with an AOD or T5 though. Wish I had 3.73's in mine (have 3.55). Quote Selected
What gears came in a 88 sport 5.0L Reply #13 – July 06, 2010, 05:51:22 PM AOD+3.73 gears=~2400 rpm at 70 mph, at least that's what mine used to do. Now with the new converter mine runs about 2800 rpm at 70 mph because the non-lockup converter slips about 400rpm in OD. I still get about 23-24 mpg at 70mph though. Quote Selected
What gears came in a 88 sport 5.0L Reply #14 – July 06, 2010, 07:45:19 PM Hell with a O/D tranny even 4:30s ain't too much... 4.30 x .68(O/D) = 2.92 final drive ratio, that ain't nuthin'... Till the AOD tranny arrived in '80, grandma's LTD or Grand Marquis was running 3.08 gears and most of those trannys didn't even have a lockup converter... Quote Selected
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