Tweet
So this is what I have. Stock 89 GW drivetrain, stock gears (2.73). I'll be putting 33's on it after my lift install. This is mostly a daily driver (inside town,) occasional highway and occasional beach/mild wheeling. So the question is 3.31, 3.54 or go 3.73 gears. Also little to no towing unless dreams come true and I get a pop up camper or even better yet a boat (so still light towing at that.)
-
89 GW- Rebuilt 360 w RV camshaft, 6 inch lift, de-smogged, 14 bolt, HD44, 35" tires -
Surf, no magic here.
How many % is your tire change?
You need that much ratio change.......
J20 project
BP Drivetrain...........
Driveshafts for all Jeeps, Constant velocity rebuilds, Replacement, Repair
775-537-7918
https://www.facebook.com/BPShafts/
Putting this back up. "Someone is gonna have to crawl under the rig" -
Going from stock, approx. 28" to 33". Using gear ratio calc looks like 3.31 will keep all ratios close to stock89 GW- Rebuilt 360 w RV camshaft, 6 inch lift, de-smogged, 14 bolt, HD44, 35" tiresComment
-
I have a 4" lift and 32" tires and the 3.73s that I put in work great. It runs about 2700 RPMs at 65 MPH. The 3.54s probabaly would have worked fine but I do a little towing with mine and I wanted the extra help in case I needed it.'89 GW; 4" Susp Lift on 32" Wild Country MTX; 360, HEI, Edelbrock Intake, Melling MTA-1 Cam, Summit 600 carb, 3.73 Gears
'70 Wagoneer; stock Buick Dauntless 350, TH400; 3.73 stock gears
'83 Wagoneer Limited; stock 360, 727, 3.31 gears.Comment
-
I did my research and decided on 3.73 for a couple reasons, my use sounds about like yours. Haven't gotten them installed yet so I can't comment on performance...Certified Novice Mechanic...
89 Grand Wagoneer (AMC 360/TF727/NP229)
A work in progress!Comment
-
My vote would be 3.73's. I went from a 32" tire with 2.72's to a 33" with 3.73. I had more "seat of the pants" improvement in performance then when I changed from a 360 to 401.
My driving is about once a week to work(70 miles round trip) and driving the beaches around currituck, NC. Also tow a 19' bowrider throughout the summer, no complaints what so ever.
,Chris1987 Grand Wagoneer w/401 (.030 over) summit 8600, performer intake w/ a Holley, Mallory 85 HEI. TF727(lock-up)/229 with 3.73's. 33X12.50 Duratracs on 15" rims. 3"BL + 3" Rough Country springs. ,ChrisComment
-
The bang for the buck just isn't there to swap from 2.73's to 3.31's. It will be better but still poor for towing especially with 33's. I'd go 3.73's or 4.10's. If you think you'll be towing someday, plan ahead. Swapping gears at both ends is an expensive time consuming swap you won't want to do again right away.joe
"Don't mind me. I'm just here for the alibi"Comment
-
And while you are at it, toss in a locker. The 229 is a full time case right?Originally posted by joe
Go with an ARB up front.82 Cherokee WT ? SFwith Alcan/agr box/Borgeson shaft/ 401/performer/Holley TA/HEI/BeCool/727/ALTAS(2.0/2.72/5.44)/D60 Snofighter(Yukon Zip,hubs,stubs,4.56)/14 Bolt (FF,BF shave,Discs, ARB,Artec Truss)/MTR 37/Corbeau Moab Seats /Hella/tuffy console/sliders/custombumpers&roll bar/WARN 8000/steering brace/CO2 Tank/dual batts/custom TCskid plate
Comment
-
another vote for 3.73 with 33" unless it's a freeway cruiser.
Jeep gauges are for amusement only. Any correlation between them and reality is purely coincidental.Comment
-
Thanks for all the advice guys. I'll prob go with the 3.73. The locker will have to wait for the next rig
89 GW- Rebuilt 360 w RV camshaft, 6 inch lift, de-smogged, 14 bolt, HD44, 35" tiresComment
-
Mine was stock with 28" and 3.31 (stock with tow package I've heard). I went to 32" with 3.73 and the speed is dead on. Nice and smooth with little lag but not too high at highway speed.
I was running 31" with the 3.31 and it was still OK. When I put the 32" on it seemed really off until the back axle was regeared.1974 J10 (401, Th400, Q-Trac, D44s, 28" tires)
Mrs Tickity - 1988 GW (360, 727, 229, D44s, 32" tires)Comment
-
I swapped by 2.73 for 3.73 for 33s and loved it.Flint
Ran when parked.
http://jubileejeeps.org/quadratrac
88 GW, 401/727/208, 5" lift, D44s/4.10s/locked up, 35s with a few Evil Twin & TT's Fabworks mods
76 401 Wag, 77 401 Wag, 77 401 J20
http://eviltwinfab.com http://www.ttsfabworks.comComment
-
Not really. It is a part time case but you can run it full time in 4wd because of the viscous coupler.Originally posted by will eFlint
Ran when parked.
http://jubileejeeps.org/quadratrac
88 GW, 401/727/208, 5" lift, D44s/4.10s/locked up, 35s with a few Evil Twin & TT's Fabworks mods
76 401 Wag, 77 401 Wag, 77 401 J20
http://eviltwinfab.com http://www.ttsfabworks.comComment
-
The 229 is marketed as a full-time case but actually its a full-time/part-time case because it has a 2WD function unlike a true full-time case like the 219. But yeah you can run a 229 year round in 4WD on any traction surface.joe
"Don't mind me. I'm just here for the alibi"Comment
-
That was the Select-Trac hype from AMC. They did it so well.
Flint
Ran when parked.
http://jubileejeeps.org/quadratrac
88 GW, 401/727/208, 5" lift, D44s/4.10s/locked up, 35s with a few Evil Twin & TT's Fabworks mods
76 401 Wag, 77 401 Wag, 77 401 J20
http://eviltwinfab.com http://www.ttsfabworks.comComment
Comment