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10-27-2007, 11:01 AM
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#1 | |
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Registered User
1987 YJ Wrangler
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automatic YJ hard shifts
Hi guys,
I have an 87 YJ with a 3 speed auto. When shifting from 1 to 2 it shifts pretty hard...jerks u forward. This is my first Jeep with automatic transmission and am wondering if these transmissions are known for hard shifting? If not...anybody got an idea what to look for? Torque Converter is new, as well as oil and seals/gaskets Thanks Nick
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10-27-2007, 11:59 AM
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#2 |
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Registered User
1989 YJ Wrangler
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Mine shifts very smoothly. I'd check the fluid first. Then make sure the kickdown linkage is properly adjusted. If you had a shop rebuild the trans I'd take it back.
__________________
89' YJ Larado 4.0L,AX15 01' Grand Cherokee 4.0L Check my Gallery for pics. My Rebuild Thread Take a minute and fill out your profile, Please |
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10-27-2007, 05:26 PM
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#3 |
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Registered User
1987 YJ Wrangler
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thanks...can the kickdown linkage affect going from 1st to 2nd?
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10-27-2007, 06:23 PM
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#4 |
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Registered User
1989 YJ Wrangler
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kickdown linkage usually affects a downshift from 3rd to 2nd in order to accel faster. Check the bands? maybe they just need to be adjusted.
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10-27-2007, 06:31 PM
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#5 |
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Registered User
1991 YJ Wrangler
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Kickdown cable will adjust the shift point and can adjust shift firmness slightly. To set it just press in the button and shorten the cable til the little stopper on the cord is just touching (or a about a milimeter away)the throttle body.
__________________
[I]"Witty quote here"[/I] |
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10-27-2007, 07:53 PM
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#6 | |
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Registered User
1987 YJ Wrangler
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Quote:
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10-27-2007, 09:49 PM
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#7 |
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Registered User
1990 YJ Wrangler
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Why do you have 3.07 gears on stock tires? I thought gearing for stock tires should be at 3.55 which is what comes in the automatic 6's. Maybe the gearing is messing with the shift points?
__________________
1990 YJ, Colorado Red with 'Laredo' markings, 4.2L, TF999, NP231, Valvoline Syn fluids, Weber 32/36, Nutter Bypass, Dana 30/35, 16" Electric Fan, Optima Yellow Top, 140amp alt., K&N Air Filter, Cherry Bomb muffler, SRC Front Bumper, CH&F Shackles, KC 100w Daylighters, Homemade Lightbar, Rear Aux lights, Cobra CB/PA/WX, 102" Whip Ant., 400 watt power inverter, 2 fire extinguishers, Mobile Internet & WiFi equipped. Daily Driver since April 23rd, 2003 Northern Illinois Extreme Jeep Club Member www.extremejeepclub.com Weber 32/36 Install -> http://www.jeepforum.com/forum/f12/weber-32-36-install-write-up-382309/ Early YJ Club Member #37 For anyone with a 4.2L --> http://groups.jeepforum.com/258s_Unite |
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10-27-2007, 09:52 PM
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#8 |
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Registered User
1989 XJ Cherokee
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1 is visible outside and the other when you drop the pan. Should be torqued to 72in/lbs I believe.
Not your trans below, but same concept. 
__________________
Live in SE WI? -----> Brew City Crawlers |
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10-27-2007, 10:47 PM
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#9 | |
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Registered User
1987 YJ Wrangler
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Quote:
I thought 3 speed auto's with inline 6 came with 3:07 gearing? |
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10-27-2007, 11:29 PM
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#10 |
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Registered User
1990 YJ Wrangler
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That's what it says in the YJ FAQ, but I can't confirm that since I did not check what is stamped on my ring. But if 3.55 is stock, and you have 3.07, then my money is on gearing for the hard shifts, because mine runs smooth as butter.
__________________
1990 YJ, Colorado Red with 'Laredo' markings, 4.2L, TF999, NP231, Valvoline Syn fluids, Weber 32/36, Nutter Bypass, Dana 30/35, 16" Electric Fan, Optima Yellow Top, 140amp alt., K&N Air Filter, Cherry Bomb muffler, SRC Front Bumper, CH&F Shackles, KC 100w Daylighters, Homemade Lightbar, Rear Aux lights, Cobra CB/PA/WX, 102" Whip Ant., 400 watt power inverter, 2 fire extinguishers, Mobile Internet & WiFi equipped. Daily Driver since April 23rd, 2003 Northern Illinois Extreme Jeep Club Member www.extremejeepclub.com Weber 32/36 Install -> http://www.jeepforum.com/forum/showthread.php?t=382309 Early YJ Club Member #37 For anyone with a 4.2L --> http://groups.jeepforum.com/258s_Unite |
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10-28-2007, 12:40 AM
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#11 |
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Registered User
1994 YJ Wrangler
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my 94 auto came from the factory with 3:07's FWIW.
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'94 4.0 auto, Rubicon Express 4", 32x11.5 BFG AT, Herc'd, other stuff..... |
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10-28-2007, 02:53 AM
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#12 |
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Registered User
1989 YJ Wrangler
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Mine has 3:07's also.
__________________
89' YJ Larado 4.0L,AX15 01' Grand Cherokee 4.0L Check my Gallery for pics. My Rebuild Thread Take a minute and fill out your profile, Please |
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10-28-2007, 07:11 AM
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#13 | |
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Registered User
1990 YJ Wrangler
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Quote:
My auto YJ also came stock with 3.07s..
__________________
1990 Jeep YJ 4.2 Howell EFI, BDS 3.5" lift, M.O.R.E 5/8" Boomerang shackles, 1" Daystar BL, 1" JKS MML, TFI, Crager soft 8s w 35" Dunlop Mud Rovers, Ford 8.8, 4.10s, Dana 30 E-Locker, Terra Flex SYE, Tom Woods CV shaft.. |
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10-28-2007, 09:21 AM
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#14 |
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Registered User
1987 YJ Wrangler
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ok...so not the gearing....can these be the symptoms of a shot tranny???
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10-28-2007, 11:36 AM
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#15 |
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Registered User
1989 YJ Wrangler
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try adjusting the bands first, the picture above is a good picture of the band adjustment inside the transmission, the other band adjustment is on the drivers side of the tranny, above the kickdown linkage, it looks like a stud with a nut on it, loosen the nut, and tighten the rod down(dont really try to crank it down), and then tighten the nut to the recommended torque specs im not really sure what they are, while making sure the rod doesnt move much. If after these adjustments, with new fluid, and check the filter and replace if neseccary, if it still shifts hard, you might need a rebuild.
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