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Post by 6886auto on Mar 23, 2022 10:32:28 GMT
I just went to test drive my 1275 automatic (was spi) and it will not drive in any gear (forward or reverse). If I switch it from neutral to 1st it will just move forward slightly. When I bought it the bolts for the torque converter were all loose. Any ideas? The manuals I have all have troubleshooting steps for either no forward or no reverse, not both.
The person I bought the engine off had not run it at all in the 15 years they had it.
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Post by prospect on Mar 23, 2022 12:57:30 GMT
Hi
I had a similar problem, the car had stood for about 10 years
Did all the checks. In the end engine out and gearbox being overhauled. Needed new clutch rings and brake bands the works.
Parts are available but not cheap
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Post by richard1 on Mar 25, 2022 13:28:05 GMT
Sometimes it could be sluggish from just sitting, with sludge or corrosion building in the valve body, or o-rings drying up from lack of oil. A conditioner like AutoRx might soften and clean that up. BUT, if someone pulled all six bolts in the converter at once, your converter could be toast, as things can fall out into it. You are not supposed to take out more than 3 at a time (for the puller). Mine were leaking a bit, so I loosened all, squirted cleaner through them, added locktite, and tightened them permanently.
You should check the pressure at the filter housing bolt, screwing in a pressure gauge that reads up to 175 psi or more. That will help with your next step. I had pressure, but no movement. Turned out my engine/trans had apparently been in a car that was wrecked from the left side, and the forward/revers clutches were bent, with the flywheel shattered. All internal damage except, on real close inspection, a hairline crack in the cover. Hope that is not your problem.
Tarija and Santa Cruz, Bolivia
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Post by 6886auto on Mar 31, 2022 1:34:11 GMT
Sometimes it could be sluggish from just sitting, with sludge or corrosion building in the valve body, or o-rings drying up from lack of oil. A conditioner like AutoRx might soften and clean that up. BUT, if someone pulled all six bolts in the converter at once, your converter could be toast, as things can fall out into it. You are not supposed to take out more than 3 at a time (for the puller). Mine were leaking a bit, so I loosened all, squirted cleaner through them, added locktite, and tightened them permanently. You should check the pressure at the filter housing bolt, screwing in a pressure gauge that reads up to 175 psi or more. That will help with your next step. I had pressure, but no movement. Turned out my engine/trans had apparently been in a car that was wrecked from the left side, and the forward/revers clutches were bent, with the flywheel shattered. All internal damage except, on real close inspection, a hairline crack in the cover. Hope that is not your problem. Tarija and Santa Cruz, Bolivia It is looking like it will be a major issue. The transmission pressure was good. I was advised to drain the oil and see what comes out. Nothing came out in the oil except the drain plug did have a lot of metal filings for an engine which has only run for a total of less than 30 minutes with that oil. I have removed the 1275 and installing the original 998 which I hope its issue will be solved by a valve block clean. Once the 998 is going I will pull the 1275 apart to find out what the issue is |
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Post by jockduck on Mar 31, 2022 10:16:27 GMT
Hi, Metal filings in the oil is not a good sign, usually the auto is a "clean" engine unlike the manual which can shed gearbox metal through the oil pump. if the oil filter is good the big junk should not get any further, it is possible that sub 12 micron stuff could get into the valve block and stick the valves. Please let us know how you get on.
Jock
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Post by mra-minis on Apr 1, 2022 15:53:49 GMT
Hi, Metal filings in the oil is not a good sign, usually the auto is a "clean" engine unlike the manual which can shed gearbox metal through the oil pump. if the oil filter is good the big junk should not get any further, it is possible that sub 12 micron stuff could get into the valve block and stick the valves. Please let us know how you get on. Jock I can be contacted on martin@kmprecisionengineering.com Where are you getting this 12 micron figure from ? |
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Post by mra-minis on Apr 1, 2022 15:58:03 GMT
I just went to test drive my 1275 automatic (was spi) and it will not drive in any gear (forward or reverse). If I switch it from neutral to 1st it will just move forward slightly. When I bought it the bolts for the torque converter were all loose. Any ideas? The manuals I have all have troubleshooting steps for either no forward or no reverse, not both. The person I bought the engine off had not run it at all in the 15 years they had it. I can be contacted on martin@kmprecisionengineering.com It can be caused by a gear set failure and or clutch pack failure, but with the latter it is rare to get both to fail at once, first things to do are check oil level there is a correct procedure for this and then check the trans oil pressure. |
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Post by jockduck on Apr 2, 2022 10:07:05 GMT
Standard oil filters filter down to 25-12 microns, stated by many auto filter manufactures
Jock
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