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Topic: Gearbox again... (Read 576 times) |
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Octavian_P
Senior Member
 
 
Posts: 1126
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Gearbox again...
« on: May 13th, 2008, 11:08am » |
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Hi there, i'm back.
I don't know if you remember but i had some trouble with the box slipping very bad in a 2-3 change.
I did an oil change (pumped it out through out the dipstick tube) and added a second oil cooler. Things got better, for a few month the box acted perfectly, did some combination of heavy traffic, and high motorway speeds and all went perfect. Suddenly on one morning when i selected D the box simply thumped violently in gear, R also thumps bad. Now all gear changes thump pretty nasty and if i try to accelerate harder each time the box shifts the TCS kicks in. I found a "remedy" if a drive about 5 km and engine temps go to normal, sopping the engine for about 5 minutes and restarting it cures the problem. I have driven about 250 km (mountains / city) without stopping the engine and the box acted again perfect (engine braking, selecting 2,1, OD -OFF, kickdowns etc.). After a 5 minutes break (engine stopped) it started thumping again.
I bought a new oil filter and oil and I'm preparing to open the box for the change, should i check something else ? What could give it the thumping. The speedometer seems to work fine so i thing the VSS is OK.
PS: i'm talking about the wonderful 24V cossie 
PS2: I did an OBD2 check and no fault codes !
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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Scorpio_Mike
Senior Member
Jeep Grand Cherokee 3.0 V6 & 2.8 Sierra XR4i 4x4
Posts: 2354
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Re: Gearbox again...
« Reply #1 on: May 13th, 2008, 12:37pm » |
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Firstly, have you cleaned the MAF - use carburettor cleaner - a 5 minute job.
Did mine a few days ago and gearchanges are now much smoother and fuel ecomony has improved about 10%.
Got to be worth a try if you asl me.
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Star sign is Scorpio !
Sierra XR4i's are great...especially when fitted with 4WD 
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Octavian_P
Senior Member
Posts: 1126
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Re: Gearbox again...
« Reply #2 on: May 14th, 2008, 11:29am » |
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The MAF can be ruled out, it's clean, also disconnecting it makes the engine run bad.
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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TiberiuS
Senior Member
Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
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Re: Gearbox again...
« Reply #3 on: May 14th, 2008, 9:47pm » |
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Hi Octavian. That sounds just like mine, cold starts would be ok for a couple of miles, 1-2nd would jolt, 2-3rd would give a loud rifle sound which would resonate through the car unless you managed to feather the throttle to ease it in. O/D would normally be ok, downshifts were quite hard, sport mode gave savage bangs and bomps on shifts 
And if you were at like 20mph and needed some throttle as it shifted up into 3rd (overtake parked cars, cyclists etc) then it would punish you with an extra loud crack which a death person could hear and everyone within a half mile radius would turn and stare at you..
Warm the car for a few miles then park up for 5 minutes, it would usually clear, sometimes till the next cold start it would then behave and shift *almost* normally. Start the car and drop straight into reverse, don't even go there 
You could normally judge by the resistance of the shifter whether it'd thump into reverse, if you got it shifted it through reverse into drive quick enough sometimes you'd avoid the thump. Otherwise it'd drop in really hard and shoot the car 2ft unless you held the brakes tightly..
And then it started to both bang and lose gear on shifts, at this point my nerves got the better of me
Yes, I nursed that car through gearshifts for 18 months, I could treach degrees in how to drive misbehaving Scorpio gearboxes
Have you checked the looms over? When I was having issues, one of the guys mentioned either a bad valve or just a symptom the material worn off of the brake bands.
Is it reading ok on the OBD? What about TPS?
Regards, Bruce.
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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Octavian_P
Senior Member
Posts: 1126
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Re: Gearbox again...
« Reply #4 on: May 15th, 2008, 8:21am » |
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The engine and box loom are new, fully and completely refurbish by me. OBD shows no errors and the TPS is ok . I bought an oil filter and oil for it, i'll try to do a change, when i'll open the pan i'll see if i can find something wrong.
By the way could i clean or check the solenoids with the pan off ?
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2.0 16V Ultima|2.3 16V Ghia|2.9 24V Cosworth Ghia
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nickjw37
Newbie
Ulti 2.0 16v
Posts: 15
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Re: Gearbox
« Reply #5 on: May 22nd, 2008, 1:57pm » |
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Hello Iam new to this site. Could you tell me what is a MAF An where is it on my auto box as my one sounds like it is sliping sometimes and i could change the oil and filter and clean the maf cheers nick
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nickjw37
Newbie
Ulti 2.0 16v
Posts: 15
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Re: Gearbox again...
« Reply #7 on: May 22nd, 2008, 3:01pm » |
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Thanks for that i will clean the MAF to see if it will stop the sliping and is the filter in side the gear boxs or on the outside?
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TiberiuS
Senior Member
Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
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Re: Gearbox again...
« Reply #8 on: May 22nd, 2008, 3:21pm » |
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Hi. To get to the filter you need to undo the autobox sump pan and drain the fluid. Not a hard job, just be careful you don't get covered in transmission fluid 
What engine do you have mate?
Regards, Bruce.
EDIT: This page should tell you everything you need to know
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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nickjw37
Newbie
Ulti 2.0 16v
Posts: 15
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Re: Gearbox again...
« Reply #9 on: May 22nd, 2008, 3:32pm » |
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Hello Bruce
I have 2.0 16v auto scorpio R reg saloon
Nick
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