Do I Need to Regear??
#1
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Do I Need to Regear??
I have a 1986 4runner sr5 with 22re automatic transmission with stock gears and 33x12.5 bfg m/t. Im gettin 11mpg and cant get over 70 on freeway. Should I regear it? If not what should I do to improve my mileage?
#2
#3
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33's are pretty darn big for the stock gears. But without knowing the overall condition of your truck, it's really hard to say. Some people could have stock tires and not be getting better mileage or speed, if it isn't running properly.
Gears would help, but also make sure it's in good running condition...tune-up etc.
Gears would help, but also make sure it's in good running condition...tune-up etc.
#5
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I looked at the plate in the door jam and this is what I found.
[IMG]http://i42.tinypic.com/2i6nktk.jpg
I was thinking about 4.88 gears. Also my truck is in good condition the body has 193,xxx original miles and the engine and tranny were rebuilt and swapped 30,xxx miles ago.
[IMG]http://i42.tinypic.com/2i6nktk.jpg
I was thinking about 4.88 gears. Also my truck is in good condition the body has 193,xxx original miles and the engine and tranny were rebuilt and swapped 30,xxx miles ago.
Last edited by BuckShot74; 12-12-2011 at 10:04 AM.
#6
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Nevermind please disregard the picture i posted.
My gear code is G282 so I have 8" 4.300 gears and 2 pinion open diff.
Thank you Hunt21286! The link you posted was very helpful. I think im gonna go with 4.88 gears or maybe 5.29 in case i decide to get 35's in the future. Whats your guy's opinions?
My gear code is G282 so I have 8" 4.300 gears and 2 pinion open diff.
Thank you Hunt21286! The link you posted was very helpful. I think im gonna go with 4.88 gears or maybe 5.29 in case i decide to get 35's in the future. Whats your guy's opinions?
Last edited by BuckShot74; 12-12-2011 at 10:07 AM.
#7
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Nevermind please disregard the picture i posted.
My gear code is G282 so I have 8" 4.300 gears and 2 pinion open diff.
Thank you Hunt21286! The link you posted was very helpful. I think im gonna go with 4.88 gears or maybe 5.29 in case i decide to get 35's in the future. Whats your guy's opinions?
My gear code is G282 so I have 8" 4.300 gears and 2 pinion open diff.
Thank you Hunt21286! The link you posted was very helpful. I think im gonna go with 4.88 gears or maybe 5.29 in case i decide to get 35's in the future. Whats your guy's opinions?
keep in mind that with the auto, you don't have 5th gear, so you'll be at higher RPMs when cruising at 60+. so your engine will be working harder. if you're not typically a highway cruiser, then this may not matter to you.
Last edited by tj884Rdlx; 12-12-2011 at 10:51 AM.
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#8
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I have an auto with 4.56s and 33s and it's ridiculously tall....I can cruise at 80mph just over 2500 rpms. With 5.29s I'd be going about 70mph just over 2500rpms. That's reasonable for 33s and might even be a little tall for 35s.
Last edited by BMcEL; 12-12-2011 at 10:57 AM.
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A340 (auto) 4th gear is .71:1
W56 (manual) 5th gear is .85:1
A340, 4.56s, 33s @ 65mph = approx. 2150 rpms
W56, 4.56s, 33s @ 65mph = approx 2550 rpms
The A340 will actually cruise at much lower RPMs in 4th than the W56 will in 5th. Yes the A340 only has 4 gears, but they're wider.
Last edited by BMcEL; 12-12-2011 at 11:10 AM.
#12
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with an auto trans, 5.29s with the 35"s will probably make you happier, give you the power you're wishing you had now. 4.88s were the option with 31s, so if you jump up to 35s you'll feel that same sluggishness you're unhappy with now.
keep in mind that with the auto, you don't have 5th gear, so you'll be at higher RPMs when cruising at 60+. so your engine will be working harder. if you're not typically a highway cruiser, then this may not matter to you.
keep in mind that with the auto, you don't have 5th gear, so you'll be at higher RPMs when cruising at 60+. so your engine will be working harder. if you're not typically a highway cruiser, then this may not matter to you.
So with the 33's that are on it i should get 5.29 gears?
That way I'll be able to get 35's in the future if I want to.
Or would 5.29 gears with 33s not be as good as 4.88 gears?
#13
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I can't get as technical as some of these other guys, but, I've run an automatic 4runner on 33's with both the 4.30 factory gears and 5.29's. I feel that 5.29's were perfect for the auto/33's combo. I was able to chirp the tires on occasion as well as easily do 75mph on the freeway in o/d.
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33s & 5.29s @ 65mph = 2485rpms
35s & 5.29s @ 65mph = 2343rpms
33s & 5.71s @ 65mph = 2683rpms
35s & 5.71s @ 65mph = 2529rpms
#16
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#17
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571 gears
Here's a few pics of my ole 87....I cranked the torsion bars for 1.5" lift in front....a center coil in the rear for 4" lift ....a full detroit in the rear....and 571 gears. That balanced out my street/highway with my trail use. I left the heavy awkward fiberglass factory top off all of its life with me....the people that sat in the back seat got the greatest offroad view of all.
http://gearinstalls.com/dadcoil.htm
Last edited by ZUK; 12-13-2011 at 06:42 AM.
#18
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31" tires were not the only determining factor in which gear ratio was used. My '90 (sig) came with 31s and 4.56s.
Incorrect.
A340 (auto) 4th gear is .71:1
W56 (manual) 5th gear is .85:1
A340, 4.56s, 33s @ 65mph = approx. 2150 rpms
W56, 4.56s, 33s @ 65mph = approx 2550 rpms
The A340 will actually cruise at much lower RPMs in 4th than the W56 will in 5th. Yes the A340 only has 4 gears, but they're wider.
Incorrect.
A340 (auto) 4th gear is .71:1
W56 (manual) 5th gear is .85:1
A340, 4.56s, 33s @ 65mph = approx. 2150 rpms
W56, 4.56s, 33s @ 65mph = approx 2550 rpms
The A340 will actually cruise at much lower RPMs in 4th than the W56 will in 5th. Yes the A340 only has 4 gears, but they're wider.
my 2nd point was comparing RPMs of the auto with 5.29s vs. the manual with 4.88s with same tire size.
apologies everyone if i was confusing there.
but i think we're suggesting the same thing, that he's going to want 5.29s at least. 5.71s are being suggested, but i was thinking that would put his cruising RPMs even higher, and just to keep it in mind.
i think i'll clam up on answering auto tranny questions.
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