gear help

f4isvt · 12-09-2009, 02:56 PM

I have a 89 22re 5 spd manual that currently has 4.10s in it. I am debating putting 4.88s in it as I drive it everyday and once or twice a year it see's the trails (since i am selling the trail rig) I am running 31x10.5x15 is a 4.88 to much of a gear for street use? Or should I switch to 33x12.50 and run 4.88s? I have tried messing with those gear calculators but I dont get it and dont know any info like trans ratios. Thanks

94Dodge Truggy · 12-09-2009, 03:18 PM

Quote:

Originally Posted by f4isvt

I have a 89 22re 5 spd manual that currently has 4.10s in it. I am debating putting 4.88s in it as I drive it everyday and once or twice a year it see's the trails (since i am selling the trail rig) I am running 31x10.5x15 is a 4.88 to much of a gear for street use? Or should I switch to 33x12.50 and run 4.88s? I have tried messing with those gear calculators but I dont get it and dont know any info like trans ratios. Thanks

Give me some rpm readings at say acruising speed of 65mph. and one of 40mph and tell me what gear you are in. That is a start.

f4isvt · 12-09-2009, 03:20 PM

with the 31 it does 70 at 3k rpm in top gear obviously I am pretty sure I can run 35-40 in 3rd gear at 3krpm

94Dodge Truggy · 12-09-2009, 03:45 PM

The rpm's seem fairly high but maybe you need that to have enough power to go . Sounds like 33's with the 4.10 setup will take the rpms down to 2500-2600 rpms. That may be nice.

Green Zuggy · 12-09-2009, 03:55 PM

Here's a link with some info that might help you determine what gearing you want to go with...:)

http://www.4lo.com/4LoCalc.htm

Hope this helps,
Jeff

gothodgie · 12-09-2009, 04:40 PM

Years ago i wheeled with a guy that had a 88 4runner w/33's and 4.88's...
He always said the highway rpm's were just a little high, but it was really nice for 2 lane driving and trail riding...

Waffle · 12-10-2009, 06:20 PM

ALWAYS anticipate going to a larger tire. It WILL happen. You wheel it twice a year yet drive it everyday. 4.88 with 31's will be too steep and kill mpg. (we're talking real bad mpg) I used to have 36" iroks with 5.29 and could cruise 70 on the highway at 18-20 mpg.

31's.....4.10/4.30
33's.....4.30/4.56
35's.....4.56/4.88
36+.....4.88/5.29

remember, base your decision as a daily driver. 33"/4.10 w/ smooth rolling radial will work fine. A bit piggish up highway hills, but still ok. Put the gear $$ to something else.

fabricator · 12-10-2009, 09:41 PM

for big tyres and offroad
my vote is 5.29 also

f4isvt · 12-10-2009, 11:09 PM

if your doing straight axle I know where a nice set brake to brake front and rear axles are 5.29s detroit front and rear 400 bucks. Anyways the big reason I wonder is I found a set of 4.88s set up for a pretty good price then could sell my 4.10s and recoop a little of my money. My truck is to fast off road unless i put it in 4low but its annoying to run around in 4low all day. I just want to make sure 4.88s wont be too much for the street.

blazerbrad · 12-11-2009, 09:17 AM

In my opinion, axle gears are mainly to opitimize performance on the street, t-case gearing is to optimize off-road performance. You simply can't get nearly the percent amount of change with axle gears as you can with lower t-case gears or a doubler.

I'm by no means a Toyota guy but we are talking about a little 22R 4-banger and not a V-8 so the powerbands are drastically different. Don't these trucks usually come with 4.10 gears stock with somewhere around 28" tires? I can see how 4.88 and 31's might be slightly low for street driving but it's only a couple hundred RPM at 65 mph higher than stock, which is probably perfect because you aren't just overcoming the added tire height but also the heavier weight and rolling resistance of the tire. I do know a guy in our club that put 33's on his stock 4.10 geared Toyota and 5th gear was completely useless even on flat roads.

Of course my idea of trails are apparently different than the original poster in regards to the comment about using 4 hi so my opinion may not work for him. I can't remember the last time I used 4 hi on any type of trail, if hi range is needed than I don't need 4wd and if I do need to go faster in 4 low I just shift into a higher trans gear. I also wheel regularly with a couple guys in Sami's with 6.5:1 t-cases and they just use 3rd or 4th gear, or even 5th gear, in the open spaces.

KargoMaster · 12-11-2009, 04:33 PM

I agree almost completely with Brad... percent change through t-case is significantly different than dif gearing...

But I've also been at Haspin on wet/sloppy days where I don't see much of low range all day... if only for additional wheel spin to clean out the tires...

Some great tech throughout...

12-09-2009, 02:56 PM	#1
f4isvt Join Date: Jul 2009 Location: Beavercreek/Dayton Posts: 47	gear help I have a 89 22re 5 spd manual that currently has 4.10s in it. I am debating putting 4.88s in it as I drive it everyday and once or twice a year it see's the trails (since i am selling the trail rig) I am running 31x10.5x15 is a 4.88 to much of a gear for street use? Or should I switch to 33x12.50 and run 4.88s? I have tried messing with those gear calculators but I dont get it and dont know any info like trans ratios. Thanks __________________ 1989 ext cab yota 22re bored .20 over trd cam, trd headers, Marlin crawler front bumper w/stinger, Marlin crawler roll cage, trailgear rear bumper, trailgear rock sliders, richmond 5.29's, and lockright rear, 33 nokian mt's. 10k winch. Rear disc conversion. Chromoly rear axle shafts. Bombproof motor mounts and transfer case mount. Whole lot of rust and scratches.

12-09-2009, 03:20 PM	#3
f4isvt Join Date: Jul 2009 Location: Beavercreek/Dayton Posts: 47	with the 31 it does 70 at 3k rpm in top gear obviously I am pretty sure I can run 35-40 in 3rd gear at 3krpm __________________ 1989 ext cab yota 22re bored .20 over trd cam, trd headers, Marlin crawler front bumper w/stinger, Marlin crawler roll cage, trailgear rear bumper, trailgear rock sliders, richmond 5.29's, and lockright rear, 33 nokian mt's. 10k winch. Rear disc conversion. Chromoly rear axle shafts. Bombproof motor mounts and transfer case mount. Whole lot of rust and scratches.

12-09-2009, 03:45 PM	#4
94Dodge Truggy EX-Vice President Join Date: Jan 2007 Location: Fairfield, Ohio Posts: 3,048	The rpm's seem fairly high but maybe you need that to have enough power to go . Sounds like 33's with the 4.10 setup will take the rpms down to 2500-2600 rpms. That may be nice. __________________

12-09-2009, 04:40 PM	#6
gothodgie Join Date: May 2009 Location: loveland Posts: 843 Images: 49	Years ago i wheeled with a guy that had a 88 4runner w/33's and 4.88's... He always said the highway rpm's were just a little high, but it was really nice for 2 lane driving and trail riding... __________________ chris hodges 96 fzj80 3x locked, 4"lift, 37s, homebrew sliders and bumpers,a work in progress 71 fj55, SOA, locked...The jungle bus... retired

12-10-2009, 06:20 PM	#7
Waffle Join Date: Aug 2009 Location: . Posts: 75 Images: 10	.02 ALWAYS anticipate going to a larger tire. It WILL happen. You wheel it twice a year yet drive it everyday. 4.88 with 31's will be too steep and kill mpg. (we're talking real bad mpg) I used to have 36" iroks with 5.29 and could cruise 70 on the highway at 18-20 mpg. 31's.....4.10/4.30 33's.....4.30/4.56 35's.....4.56/4.88 36+.....4.88/5.29 remember, base your decision as a daily driver. 33"/4.10 w/ smooth rolling radial will work fine. A bit piggish up highway hills, but still ok. Put the gear $$ to something else.

12-09-2009, 03:55 PM	#5
Green Zuggy Join Date: Aug 2009 Location: Dayton, OH Posts: 146 Images: 231	Here's a link with some info that might help you determine what gearing you want to go with...:) http://www.4lo.com/4LoCalc.htm Hope this helps, Jeff

12-10-2009, 09:41 PM	#8
fabricator Join Date: Jan 2007 Location: Cincy, Oh Posts: 947	for big tyres and offroad my vote is 5.29 also __________________ For you guys who can't drive, I have owned a frame rack for several years. Prices are based on your skill and ability to wreck it....

12-10-2009, 11:09 PM	#9
f4isvt Join Date: Jul 2009 Location: Beavercreek/Dayton Posts: 47	if your doing straight axle I know where a nice set brake to brake front and rear axles are 5.29s detroit front and rear 400 bucks. Anyways the big reason I wonder is I found a set of 4.88s set up for a pretty good price then could sell my 4.10s and recoop a little of my money. My truck is to fast off road unless i put it in 4low but its annoying to run around in 4low all day. I just want to make sure 4.88s wont be too much for the street. __________________ 1989 ext cab yota 22re bored .20 over trd cam, trd headers, Marlin crawler front bumper w/stinger, Marlin crawler roll cage, trailgear rear bumper, trailgear rock sliders, richmond 5.29's, and lockright rear, 33 nokian mt's. 10k winch. Rear disc conversion. Chromoly rear axle shafts. Bombproof motor mounts and transfer case mount. Whole lot of rust and scratches.

12-11-2009, 09:17 AM	#10
blazerbrad - CORE Member - Join Date: Feb 2007 Posts: 831 Images: 6	In my opinion, axle gears are mainly to opitimize performance on the street, t-case gearing is to optimize off-road performance. You simply can't get nearly the percent amount of change with axle gears as you can with lower t-case gears or a doubler. I'm by no means a Toyota guy but we are talking about a little 22R 4-banger and not a V-8 so the powerbands are drastically different. Don't these trucks usually come with 4.10 gears stock with somewhere around 28" tires? I can see how 4.88 and 31's might be slightly low for street driving but it's only a couple hundred RPM at 65 mph higher than stock, which is probably perfect because you aren't just overcoming the added tire height but also the heavier weight and rolling resistance of the tire. I do know a guy in our club that put 33's on his stock 4.10 geared Toyota and 5th gear was completely useless even on flat roads. Of course my idea of trails are apparently different than the original poster in regards to the comment about using 4 hi so my opinion may not work for him. I can't remember the last time I used 4 hi on any type of trail, if hi range is needed than I don't need 4wd and if I do need to go faster in 4 low I just shift into a higher trans gear. I also wheel regularly with a couple guys in Sami's with 6.5:1 t-cases and they just use 3rd or 4th gear, or even 5th gear, in the open spaces.

12-11-2009, 04:33 PM	#11
KargoMaster Cleaning off the rust... Join Date: Jan 2007 Location: Cincinnati, OH Posts: 1,009	I agree almost completely with Brad... percent change through t-case is significantly different than dif gearing... But I've also been at Haspin on wet/sloppy days where I don't see much of low range all day... if only for additional wheel spin to clean out the tires... Some great tech throughout... __________________ brad 5.0L \| 435 \| 203 \| 300 \| 4.10 \| 39.5 Buildup BACK underway...

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