Rear End Ratio?
- Thread starter custompony
- Start date
sdmustangrider
New Member
I've been interested in a T-5 lately, and from what I hear, 3.73 is pretty good for both if it comes for a 8.8. I'm running a C4 3.40 Ford 8 and it's not THAT bad.
blown65
Founding Member
At least 3.73's. Personally I'd probably run 4.10s cause even in 5th your going to have nice highway rpms and in the lower gears great performance. 1st is going to be kinda short though with the 4.10s depending on the gearing of your T5.
65fastbackresto
Active Member
I have T-5 and 355 rear
I can shift from 4th to 5th at 70 mph and it`ll drop to almost 2000rpm`s, which for my motor, is kinda lugging it. If I could do it over I`d prob go 411`s.
I can shift from 4th to 5th at 70 mph and it`ll drop to almost 2000rpm`s, which for my motor, is kinda lugging it. If I could do it over I`d prob go 411`s.
That will have a good bit to do with your camshaft and your engines "happy spot", also the ratio of your T5, since they vary some. If you have a fairly bone stock 302 then 3.55-3.73's will probably do wonderful, but if your engine is modded and likes higher RPM's then 3.73-4.11's. Lots of guys on here with that swap.
65fastbackresto
Active Member
Thats my problem,, motor is built for top end
I can either run 55mph or 80mph in its happy spot. It gets pretty scary over 100mph though, its like too much motor not enough car.
I can either run 55mph or 80mph in its happy spot. It gets pretty scary over 100mph though, its like too much motor not enough car.
jlangholzj
Mustang Master
this. I've got a fairly standard HCI 289 and with the o/d ratio of an AOD and 3.00 gears it was at about 1200 rpm. I'm planning on putting 3.73's in as I've ridden in other mustangs with a similar setup and it seems to be well. with the .76/1 of the AOD and 3.73 gears we were seeing about 1800-2k at speeds of 60mph or so. But it climbs out of the hole mighty fast
That thing is awesome. Right now at 80mph in 5th I'm at 2k. Definitely looks like 3.73 or thereabouts is gonna be great for me. Thanks for the responses.
blown65
Founding Member
this. I've got a fairly standard HCI 289 and with the o/d ratio of an AOD and 3.00 gears it was at about 1200 rpm. I'm planning on putting 3.73's in as I've ridden in other mustangs with a similar setup and it seems to be well. with the .76/1 of the AOD and 3.73 gears we were seeing about 1800-2k at speeds of 60mph or so. But it climbs out of the hole mighty fast
We run 4.56's with our AOD car and its still 2500-2600 at 60-65mph. Not too bad IMO for a classic. However its set up for the rpms that motor sees.
jcode68
Active Member
I'm running 3.73's with my T5 and think it is the perfect ratio. If you plan to spend time on the strip, you might want to go steeper, but for street driven, I have no regrets.
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