reuben

i just bought a 1992 jeep cheerokee has v6 (h.o) auto ...when i take off from a corner or any where...i count ever time my tranny makes a change an it changes 4 time by the time im at 45mph an when im at 55mph im at 2,200 rpm an i dont know if that right i thought it should shift to over drive so i speed up an hold it steady at 65mph an doesnt shift but its at 3,000rpm so any idea all comments are welcome ......thanks in advance

XJ?2010

well the cherokee either had a 4 speed with overdrive or a 3 speed and if it shifts 4 times from a dead stop that means it would go from 1 to 2, 2 to 3, and 3 to 4, now if you feel a 4th shift its probally your overdrive unit so yes i would say its normal but next time i go out i will pay attention to at what points mine shifts

also the cherokee does not have a V style engine it is an in line 6

Jabo

Mine does the same thing You pulling out with the shifter in o/d

reuben

so when im going 55mph an my rpm are sitting at 2,200 thats normal in a jeep ... im use to my lil 4 banger with 5spd .....ya i forgot it was inline ....well i guess if its normal then ill drive poop out of it ...... thanks ....

The Downward Spiral

Best way to tell if it is in overdrive is to get to a steady speed and check the RPM. Now put the shifter down into the 3 position and see if the rpms go up.

COSXJFAN

That does not sound right. I've got 4.88s and at 65 I sit a little over 2400 rpms. I don't know what you've got goning on, but it sounds like something is not right there. I could be wrong, it just doesn't sound right to me. HTH!!

ktmracer419

1st
2nd
3rd
4th
4th with torque converter lockup

the 4th "shift" you feel is most likely the torque converter locking up.

if you give it a little extra throttle or go uphill the torque converter will unlock to give you a little extra power, sounds like yours is unlocking prematurely 3000 rpm is very high for 65 mph in a stock xj. i don't know how to fix the issue, but thats my diagnosis.

COSXJFAN

If all of the other shifting feels normal, can't he just replace the converter to fix the problem?? Isn't there a clutch pack in the converter that could be out??

prerunner1982

Per this nifty website (http://www.onlineconversion.com/bigger_tires.htm) it says your RPM @ 65mph in 3th gear (1:1) is 2394.599 In 4th (.75:1) @ 65mph it says 1795.95 rpm. This is with a 3.07 rear end ratio.. If you have 3.55 for example your RPMs should be 3rd gear=2769, 4th gear=2076.75 This is also with stockish 28" tires. Try it for yourself with the correct info and see what you get.

okcjeeper

I run 30's and in 4th I run less then 2k rpm's...that is with the converter locked...

The Downward Spiral

Another way to check the torque converter lock-up is to tap the brake pedal while remainig steady on the gas pedal. The rpm should rise slightly when the brake is tapped.

reuben

ya im about 2,700 at 65 i step on gas when im going steady an no shift so i down shift third no shift ...shift back d an no shift agian i think im stuck in third i drive only 55mph aN im in between (2270-2300 ) so this suck but i want get my trans flushed an new fluids an filter cause i call prev. owner an he siad he never did tran flush or chnged filter so either it fix it or im in need of trans so but i fill 4 shift but im still at 2,240 at 55mph mabye no lock up just 4th gear no clue my first jeep im use to tunner cars but i want vehicle that i can drive all year in michigian so jeep all way ......o ya

sport76

Could be a band broke. my old limited was pulling small empty u-haul trailer up 495 Wash. DC and hit the gas and it sounded like a bottle breaking in the transmission. then it wouldnt go past 3rd . not to good for driveing down 5 lane 55- 70 mph highway. just a thought.

nick_n_ii

I'm surprised it wasn't said already, you don't have a V6 you have a I6 (inline six)

ktmracer419

check the first reply