4.10 in the eta!

[ANDRÜ]

Well, after some times I finally got the 2.93 out, and the 4.10 in!! Im soo happy witht he new stup, on the streets anyway. Im not looking forward to the highway, but it has to happen some time. Does anyone know of any other owners of etas with 4.10s? I just want to know of anything to watch out for, since the redline is pretty low.

[JasonC]

Well, after some times I finally got the 2.93 out, and the 4.10 in!! Im soo happy witht he new stup, on the streets anyway. Im not looking forward to the highway, but it has to happen some time. Does anyone know of any other owners of etas with 4.10s? I just want to know of anything to watch out for, since the redline is pretty low.

i put 3.73's in my eta. at 65 it's around 3000rpm. They helped mine out alot when i'm pulling a mountain or steep hill. The redline come's on a little faster cause of the deeper gears.

[e30_325es]

At some point I've got a 4.10lsd to drop in my eta sport, I just need to feel like putting it in.

I'd say the main thing you will have to look out for is the redline/limiter.

[Garageaholic]

Say goodbye to first gear my friend :)

[JasonC]

Say goodbye to first gear my friend :)

Yeah, move 5 feet and that's it for 1st gear :)

[JGood]

Can you note the actual road speeds at redline for each gear and get back to us? I'm considering dropping a 3.73 in mine but I also have a 4.10 so who knows. I would think dropping in a 4.10 in place of a 2.93 would basically put 2nd gear where 1st was, 3rd where 2nd was, etc.. so it's basically like driving a 4 speed with a crawler gear if needed. This could be verified if someone could record road speeds at max rpm in each gear....

[e30_325es]

Use this: http://www.f-body.org/gears/
24in tire diameter
gear ratios (1-5): 3.83 / 2.20 / 1.40 / 1.00 / 0.81

[jhower08]

according to the calculator the results are as follows justin...
RPM 1st 2nd 3rd 4th 5th
500 2 4 6 9 11
600 3 5 8 11 13
700 3 6 9 12 15
800 4 6 10 14 17
900 4 7 11 16 20
1000 5 8 13 18 22
1100 5 9 14 19 24
1200 6 10 15 21 26
1300 6 10 16 23 28
1400 6 11 18 25 30
1500 7 12 19 26 33
1600 7 13 20 28 35
1700 8 14 21 30 37
1800 8 14 23 32 39
1900 9 15 24 33 41
2000 9 16 25 35 43
2100 10 17 26 37 46
2200 10 18 28 39 48
2300 11 18 29 40 50
2400 11 19 30 42 52
2500 11 20 31 44 54
2600 12 21 33 46 56
2700 12 22 34 47 59
2800 13 22 35 49 61
2900 13 23 36 51 63
3000 14 24 38 53 65
3100 14 25 39 54 67
3200 15 26 40 56 69
3300 15 26 41 58 72
3400 16 27 43 60 74
3500 16 28 44 61 76
3600 17 29 45 63 78
3700 17 30 46 65 80
3800 17 30 48 67 82
3900 18 31 49 69 85
4000 18 32 50 70 87
4100 19 33 51 72 89
4200 19 34 53 74 91
4300 20 34 54 76 93
4400 20 35 55 77 95
4500 21 36 56 79 98
4600 21 37 58 81 100
4700 22 38 59 83 102
4800 22 38 60 84 104
4900 22 39 61 86 106
5000 23 40 63 88 108

[JGood]

edit: it looks like a 3.25 is still better for autox use. I just made shift point/speed maps and 90% of ~50 sec autox tracks would require so many shifts it would be a huge waste for a slight acceleration increase.

That sure must be fun on the street though!

[Mike325]

I always wondered what it would be like to put that diff in the eta. How is the acceleration now?

[ANDRÜ]

^VERY nice!! I cant drive it on some serious roads, or roads that are busy b/c I switched insurance from the eta to my Jeep for winter. I just tested it out on my road, which is fairly rural. Its a great improvement.

[e30_325es]

I just dropped my 4.10lsd in my ES, and absolutely love it! I took it up on the highway, and 75 is ~3500rpm. Do not downshift to 4th up here, 4th at 75 is 4500rpm, so that's a useless shift, plus it pulls pretty good in 5th anyway.

[RedHoodRidah]

How would a 4.10lsd perform in a 325is?

[Mike325]

It would be very nice.

[RedHoodRidah]

Cool. Do I get to keep 1st gear though??