Well its about that time after drivin the hell out of this truck I feel it needs some gear in it. So for those of you that have made the change to either gear please tell me your thoughts. If you have taken it to the track after the change what improvements were made. I drive the truck daily and would like to keep the drivability. The truck will also be sprayed with nitrous.
thanks,
sebastian

 

I would also like some actual times of trucks with 410-3.73.
I had a chevy with 4:10s.Why do people make a big deal about it.It is not like your truck is cruising at 4000 rpm all the time!My chevy was a great daily driver.I would however like to know performance #s.I did have one problem,My truck would only due about 100 mph in third.Gm trucks will not go into overdrive at wide open throttle.You have to let off.I did get it to about 130mph by feathering it.Soon as my pedal went down a little more it went into 3rd and was like hitting the brakes.Fords are not like that.As you all know.Other than that one problem I loved the 410s!! I ran a 14.9 at 92mph.This was faster than most lightnings at my track back then.They were running 15.1-15.2All i had was a thermostat/hypertech programmer/kn filter,dual exhaust,410s w/loc-rite lockerStock they were running 15.8-16.2

 

4.10's are NOT too much.

I turn 2,000 RPM at 70 MPH with 3.73 and LT245x16's -- and that would calculate out to be 2,200 RPM at 70 MPH -- clearly not excessive.

I'd rather have 4.56 -- would be 2,450 -- which is what I do at 85 now.

Thanks to OD, you can afford to have some decent gearing.

(BTW -- I got 15 MPG last Sunday on a 285 mile jaunt at speeds of 85 to 95 -- 4 people -- gassed to overflow both ends.)

------------------
Y2K™

XLT SC SB 5.4L 3.73LS

 

n20:
I have the 4:10's and LOVE THEM!!!!!
The rpm with 3.55@ 60mph in third is 2521rpm
with the 4.10@ 60mph in third is 2910rpm.
As you can see it's not that much rpm change, but you sure can tell by the way it pulls(alot harder with 4.10's). You will need a chip to correct the speedo,but who doesn't have a chip. I use sal's chip. I had the gears first and ran the truck, so I know what is to be had by the gears only

Can you still get a killer deal on (NOS) nitrous? e-mail me.

12.89@107.62 to date

------------------
JIGAWATT SVT#2698
N.L.O.C. Member
KSP 4" Filter Kit
4:10's
Bassani kit
TransGo shift kit
AIM 2 inch drop shackle

 

Of course I can... Can you give me the part #,s I would need to pick up the 4.10 gearset.
Also any other items which would be needed shims,etc...
dont know your email address but here is mine...nxtlvlrcng@msn.com
thanks,
sebastian
Maybe we can work out a partial trade or something..
regards,
sebastian

 

.

 

I also have 4:10's and am in agreement with everything Jigawatt says above.

------------------
1999 Lightning Black, PSP Chip, Bassani(Full), PSP Filter,
4:10 Downs, ARE, Bedrug,Goodrich T/A Drag Radials
13.25/101 idg@home.com

SVT# 2917 DOB 7-26-99
Northern CA, 98 Gold Lexus GS 400, 67 Pearl White Nova

 

Do the gears really make the truck faster or do they just seem faster.Does anybody have any actual times.Sometimes a gear change feels faster but is actually slower.On my 99 silverado I went with a much smaller tire and I actually lost 4-5 tenths because of the gear change.

 

Where can you buy 4.10 gears? Ford doesn't stock thenm for the 9 3/4 rear-end. Only place I have found is Downs Ford and they want $575 for a set of theirs (just for the parts!). Help me out!!!

 

JS Gear Huntington Beach ,Ca 714-841-4545
cost for the 4.10s is about 50.00..installation is 200.00 + fluids etc. They have the gears at their local wherehouse..9.75.

 

N2O-

Thanks for the info. Talked to Steve there, he said the Ring & Pinion was $350 for the parts. Is that what you meant to type in?

Thanks...Alex

 

1BADFRD;

I bought my gears from US Gear part #F75W-4209-EA. This is for the 9.75, price $322. You also need Ford Part# N811024-S100 and this is $7.92 (this is a pinion nut).

With this set you'll need pinion shims and side carrier shims. I had to modify 10.25 pinion shims to work.

Ford from the sterling plant has 4.10 gears. Ford motorsport number M-4209-H410. This is the factory ford gear and when replacing factory gears, 99.9% of the time you do not have to reshim. Just reuse shims that came out of 355's. You will need to buy the same nut #N811024-S100.

Now for the great news. List price is $199 if you call a good motorsports dealer. For me, that was Aldridge in Portland Oregon. And they said they'd sell me a set for $169. If I only knew this before, I would have deffinately gone with Ford gear. Not just for $ sake, but headache of resetting up the gears.

 

Jigawatt-

Thanks for the detailed explanation and part numbers. It is very much appreciated. Folks like yourself are why I enjoy this forum so much. I feel we can all learn from each other instead getting every lump ourselves.

Thanks...Alex

 

4.10 gears are on my next to get list. Thanks for the helpful info guys. Just one question, I thought you could not get the spedo. accurate with the 4.10s. Sals chip can do this? I thought Sal couldnt do this. Please let me know how he does this.Thanks.

 

Alex,
thats what I meant to type in not the cost of installation. But on the other hand I think I will go with Jig,s recommendation. Thanks,
sebastian