Another gear thread

[Silver91Hatch]

So. I have a rear end that will be going into my car as soon as I get time. It will be all setup, 31 spline axles/diff, disc brakes, etc. Now my question. I have a set of 3.27's, 3.55's, 3.73's and 4.10's in the garage. Which gear??? I want everybodies opinion on this. Its a 347 5 speed coupe. Mostly street action with a 2-3 nights of track time a month. I don't drive it everyday by anymeans but if I want to go to work FAST, I take the coupe. I also will need to drive it to Mustang Week and its a pretty long haul. It currently has 3.55's in it now but it feels like I can do 100 in 1st gear. It bogs in normal driving then off like a rocket. At the track its 100X's worse. Do I need some 3.90?? Thanks in advance.

[Notch93]

If it was me, I would do 4.10's. The 4.10's in 5th won't be that bad on the highway. My friend in FL, has the same basic setup as yours. He runs 4.10's, and let me tell you, that car hauls the mail. Plus it's his daily driver also.

[Quinn]

I had 4.10's in the purple car and i drove it home and hour and half on the highway. It isn't as bad as everybody says it is. i would go with 410's:thumbsup1:

[Silver91Hatch]

I know we took my buddies car (99 GT) and removed the 3.08's and wnet straight to 4.30's and it HOOKED for about 6 feet. Then broke an axle. Got some 31 spline units, then went threw a rash of T45 input shafts. I am probally going to go with 4.10's and be easy on it, its just a T5!!!

[Notch93]

You can tear the T5 up just as easy with 3.73's.:yes1:

[Wayne's 88 GT]

For what your combo is and what you want to do with it..........4.10's would be good. Since it is more a fun car and take it to the track....:3gears:

[XSR]

You have a problem somewhere, and it's not gear related. I have a stk. bottomend 302, with a cam, ported TW heads, ported Vic 5.0 intake, all high rpm stuff, and I run 3.73's now. It pulls like a raped ape, and if in a roll in 2nd gear once over 4,500 it breaks the tires loose. You need to find your problem, even with 2.73's a 347 should shredd the tires in 1st or 2nd.

[SVTSkip]

I'd do the 4.10's...

[Silver91Hatch]

It will shread the tire in 1st, 2nd and 3rd. With the 3.55's now, in 3rd rolling at 45-50 if I punch it, its boils the tires. I am just worried that the 4.10's will be more a track car and something that will like to overheat and not run down the highway for a long time.

[XSR]

When you say it bogs on the street, I still say something is not right. At the track can be a different story, if on slicks. That just means you need to raise your launch rpms more.

[Silver91Hatch]

What I am trying to say is leaving a dead stop, it feels like it bogs(more than I like) for the first 2-300 RPM, if I raise the rpm on the street it boils the tires. It could just be the way the clutch is or the way I'm used to driving the 4 banger 99% of the time. My 4 banger has 3.73's and it bogs(under powered) like the 3.55's but it takes less time to come back. Its not a motor problem, more a traction issue when it starts making power. I can let off the clutch with 0 throttle and it will pull off. I am just worried about an overheating/ long high rpm on the way to MW. I am leaning 4.10's.

[Wayne's 88 GT]

I'd say before you change the gears.............I'd get the TB and CAI changed so you can get more air into that stroker you got there......just my .02

[Silver91Hatch]

This is all going to happen at once. I have a Walbro 255, 70mm TB/Spacer, axles, diff, southside lowers, tubluar uppers, gears, etc. All of it is going to be installed when I get a few more parts. I still need some brake hardware and hoses, a power pipe and most of all time.

[Wayne's 88 GT]

This is all going to happen at once. I have a Walbro 255, 70mm TB/Spacer, axles, diff, southside lowers, tubluar uppers, gears, etc. All of it is going to be installed when I get a few more parts. I still need some brake hardware and hoses, a power pipe and most of all time.

Sounds like you are going to make alot of changes at one time.......if it was my car.......I think I'd maybe do the fuel pump......tb and spacer.....set it up and then drive to see what changes it made. I just hate seeing people throw a bunch of parts on a car then drive it and not know what did what and which change is causing things to go or not go right. again.....just my opinion

[Silver91Hatch]

Well. I need to do the fuel pump. The stocker is holding me down, but it is slam full of 93 octane(If I can get it below $2.00 I'm hording it). The TB/spacer needs to come off to fix a noisy rocker arm/s. The CAI is WAY to small and need I am still on the lookout for a power pipe or a JLT intake for a N/A fox. I have the rear end in the garage on jackstands right now with 3.73's in it and setup, BUT it has 28 spline axles and carrier in it also, SO I am going to have to remove it to swap to 31 spline so why not go 3.90 or 4.10. I will swap it piece by piece and road test it(like I'm writing on a R/O) and make sure it all jives. I am also looking into a C4 down the road in which I will need my 3.55's back but that is way down the road. I have a shot AOD and a shot C4 in the garage but I don't know about having an AOD car. Something screams SLOW to me but I know there are fast AOD cars out there, it just leaves a bad taste in my mouth saying AOD. I have rebuilt and modded MANY C4's and I love them, other than no Overdrive, but I was also looking into a GearVendors for my C4 car, just for the highway. Now that the rant is out of the way. I also have stock tail pipes (LX). I have seen MANY LX's with huge after market tailpipes but are the stockers that restrictive??? I have a set of flowmaster tailpipes in the back of the garage for an LX but no mufflers, I have debated swaping them into the coupe and the 4 banger get the stock LX pipes.

[rsw007]

1/4 mile track or 1/8th mile. that would make the call.

[Silver91Hatch]

1/8 mile around here. Closest 1/4 miles is Charlotte or The Rock!!

[Notch93]

I have a shot AOD and a shot C4 in the garage but I don't know about having an AOD car. Something screams SLOW to me but I know there are fast AOD cars out there, it just leaves a bad taste in my mouth saying AOD.


Be careful, very careful on that comment.:yes1:

[Silver91Hatch]

AOD's take more money to shift like the way I want them to. Stall's cost more, They are inherently weaker in stock form, they like to slip and have more to go wrong than a C4. Its either a C4, built AOD, Astro/G-Force T5 or a TKO transmission as soon as this limping T5 goes.

[rsw007]

Yeah AOD'S are slow!
best ive been able to do is 7.0's in the 1/8th with a bad tune hopefully next time will be 6.9's. **** stock intake and cam.

[Silver91Hatch]

What do you have done to the AOD????

[Notch93]

Its either a C4, built AOD, Astro/G-Force T5 or a TKO transmission as soon as this limping T5 goes.

You can get either one from Tony, the TKO or the G-Force. Both of them will cost you over $2,000. I can have a AOD built with all the good parts for less.:yes1:

To get either a manual or automatic, that will live behind some good power and torque is not going to be cheap.:nonono1:

[Silver91Hatch]

Maybe a T56 and a set of 4.30's.....

[rsw007]

What do you have done to the AOD????

upgraded cluthes servo valvebody and good converter

[Notch93]

Maybe a T56 and a set of 4.30's.....

You want to spend even more money huh?

[Silver91Hatch]

Yeah AOD'S are slow!
best ive been able to do is 7.0's in the 1/8th with a bad tune hopefully next time will be 6.9's. **** stock intake and cam.

Man your doing something right. A stock cammed and intaked 5.0 with a almost stock rebuilt AOD with a converter going in the 6's???? Either its got a BUNCH of smack on it and good suspension or it weights about 35 lbs and it has 5.14 gears. Whats going on??

[Silver91Hatch]

You want to spend even more money huh?

Its not about spending a lot of money, its about spending money smart.

[Notch93]

Its not about spending a lot of money, its about spending money smart.

I would stick to a TKO over the T56. If you want to spend your money smart.:yes1:

[Notch93]

Man your doing something right. A stock cammed and intaked 5.0 with a almost stock rebuilt AOD with a converter going in the 6's???? Either its got a BUNCH of smack on it and good suspension or it weights about 35 lbs and it has 5.14 gears. Whats going on??

With his suspension setup correct, ported lower, GT40 heads, good TC and the juice. He is right where he should be.:yes1:

And having to use AOD's for the past 19 years, it doesn't take much to make them work how they should.

[Silver91Hatch]

I am debating on a tranny. I can get a busted T56 and parts are still availbe at work at a bit cheaper price. I can fix it and swap it in. If I was going AOD it will take a lot less initial spending but more on the back side. I might pop that AOD open and take a look. If no hard parts are shot it might get a shot behind the 347, if and when the T5 goes out.

[Notch93]

I am debating on a tranny. I can get a busted T56 and parts are still availbe at work at a bit cheaper price. I can fix it and swap it in. If I was going AOD it will take a lot less initial spending but more on the back side. I might pop that AOD open and take a look. If no hard parts are shot it might get a shot behind the 347, if and when the T5 goes out.

I'm not saying you should go with a AOD.:nonono1: Just don't under estimate them, because they can work great, without having to spend $3,000 on a Lentech.:yes1:

I have just heard a lot of horror stories about T56's.

[Silver91Hatch]

Well I have to have overdrive with 4.10's. I already have a C4 car with 3.55's and thats steep. If the 4.10's go in it needs either a T5, TKO, T56 or an AOD or the 3.73's for that matter. A T5 is too weak. A TKO is big money along with a T56. The AOD is free but will need around $1300 in mods to run the way I want it to. The T5 isn't broken YET. But just mapping out some options.

[rsw007]

Man your doing something right. A stock cammed and intaked 5.0 with a almost stock rebuilt AOD with a converter going in the 6's???? Either its got a BUNCH of smack on it and good suspension or it weights about 35 lbs and it has 5.14 gears. Whats going on??

125shot and 4.10's with 275/60 drag radials. cutting low 1.4's

[Silver91Hatch]

125shot and 4.10's with 275/60 drag radials. cutting low 1.4's

What suspension are you running front and rear??

[rsw007]

What suspension are you running front and rear??

monroe struts front and moroso springs 2coils cut out no swaybar

monroe shocks with lowering springs with 1coil cut out. steeda lowers and upr adjustable uppers. subframeconnectors.
http://f5.putfile.com/5/12619430124.jpg

[Silver91Hatch]

Wow. Cutting 1.4X 60's....

[rsw007]

Wow. Cutting 1.4X 60's....

best so far 1.43 60ft

[Silver91Hatch]

Well I'm guessing the 4.10's and preloading helps a lot. I have a 69 that is a LOT heavier with 3.50 gears and a C4, basic bolt ons and I was happy with a 1.89 60 ft. Its been a best of 1.79 but I think it was an error on the timing tower's part.