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not to resurrect an older thread, but i feel i need some advice.

some of you have seen and replied in my other thread about my A833 grinding when i make the 1-2 shift under partial or hard throttle, but not under very light acceleration. I have taken the whole transmission apart and inspected every peice, and everything is working and worn as it should be with no visible issues at all. I changed the fluid in the transmission to AC delco synchromesh, and now im wondering my problem is the fluid im using?

Im thinking of trying ATF since i see quite a few people recommend it, and since its also dirt cheap and there is no non GL5 gear oil on any shelf here. Im wondering though what kind of ATF should I be trying? Dextron? Mercon? straight ATF? does it matter if its Dextron 3 or 4? Just looking for some input here since id like to refill the trans with ATF and see what happens

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not to resurrect an older thread, but i feel i need some advice.

some of you have seen and replied in my other thread about my A833 grinding when i make the 1-2 shift under partial or hard throttle, but not under very light acceleration. I have taken the whole transmission apart and inspected every peice, and everything is working and worn as it should be with no visible issues at all. I changed the fluid in the transmission to AC delco synchromesh, and now im wondering my problem is the fluid im using?

Im thinking of trying ATF since i see quite a few people recommend it, and since its also dirt cheap and there is no non GL5 gear oil on any shelf here. Im wondering though what kind of ATF should I be trying? Dextron? Mercon? straight ATF? does it matter if its Dextron 3 or 4? Just looking for some input here since id like to refill the trans with ATF and see what happens

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Forget that idea. Its not the fluid. Think about it, if it was an issue of the fluid(which it clearly isn't), then why only 2nd gear? Follow that logic?

Did you do what I mentioned for you to do in tn my previous post in this thread?

MB

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Having tried many fluids the best for a getting a "touchy" transmission to shift well is Redline synthetic. Its available in two grades: "MTL" which is 70W80 from memory and 90 weight. Either one would work in an 833 - I'd suggest the MTL for easiest shifting with adequate protection of bearings/gears. Summit and others sell it.

I believe the ATF and syncromesh options are too light for an 833 (I know, controversial topic). That said if it won't shift smoothly on syncromesh you might well have problems with the hard parts as posted above.

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Well the hard parts have been inspected as per instructions here by a qualified manual transmission mechanic and everything is in good working order. I was kinda disappointed to not find anything wrong because now im really stumped. Gonna put it back on the road and see what happens.

Now im really confused...do i spring for some gear oil, or go to ATF? lol

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My dad is the original owner of a '70 challenger 383 4 speed car - he now has 114,000 miles on it. it had a rebuild at 112,000 miles and all that went in it was bearings, shift forks, seals, & gaskets.
He towed a camper trailer from NJ to as far as Missouri. He also drag races it when he has time and is never easy on it.

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My dad is the original owner of a '70 challenger 383 4 speed car - he now has 114,000 miles on it. it had a rebuild at 112,000 miles and all that went in it was bearings, shift forks, seals, & gaskets.
He towed a camper trailer from NJ to as far as Missouri. He also drag races it when he has time and is never easy on it.

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DJV CUDA, Please tell all of us the comlete story of why that 1970 Challenger has a 1971 and newer side cover on the trans. You posted a picture of the inside of that trans years ago and I remember you had more to tell about this trans than you are saying here. You had an explaiation for the side cover being changed. That will shed some more light on this original trans that wasn't rebuilt till 112,000 miles.

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Dad ordered this car in late 69, is was built in late '69 and he got it early 1970.
during the first year of his ownership ( going by his story ) he has shifting issues with the original tranny, he had taken the car to Cherry Hill Dodge to have it looked at. He watched as they pulled the trans, pulled it apart, and proceeded to get looked over by about everyone in the shop, they came to him several hours later trying to say they had an issue with the tranny ( Syncros ) and it might be awhile before they could get him a new one, Dad apparently asked if they knew how to put the tranny back together with new syncros, and they told him no!

He had to wait and was given a new tranny. all was well for the next 112,000 miles.

When we rebuilt this ( with the help of Jamie Passon ) we ordered all the parts necessary for a 23 spline 833 and gave Jamie measurements on the front bearing that was supplied with the unit. We recieved the parts and then noticed that the bearing retainer was larger then the bearing. Calling Jamie Passon revealed that we had a small block tranny in a big block bell ( large retainer hole, small retainer bearing)

Jamie was excellent about swapping parts for us, and I bet he remembers this story to this day ( this was rebuild several years ago now)

Anyway, the car was run, with the 1971 tranny since late 1970 till about 2005 / 2006 with the bearing retainer not doing it's job, towing, racing etc... all not centered properly - the good thing is that it was centered close enough and didnt break!

Thats the whole story, probably still confirmable by Jamie himself.

We got it back together, needing new bearings, seals, gaskets, and shift forks.

Cherry Hill Dodge is still in buisness, and has about the same workmanship issues to this day...lol... he wanted to take it back to them and break balls since they didnt know what they were doing inthe first place and messed him us second!

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Cherry Hill Dodge is still in buisness, and has about the same workmanship issues to this day...lol

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a bunch of hacks at that place.

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Think about it, if it was an issue of the fluid(which it clearly isn't), then why only 2nd gear? Follow that logic?

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I love these posts...well not really...lot's of opinions and hot air, little fact.

Why you would anything other than Passon lube in a 4 speed is beyond me. The year is 2011 NOT 1971!.

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I love these post too! Ya' first hand experience here. I'm the original owner of my RR. First 10 years of it's life, it was our family car/daily driver/grocery getter. Now it is my weekend cruiser and part time race car. Since about a month after I bought it the trans has had nothing but ATF. No unusal issues at all. How's 43 years of experience suit you?

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Think about it, if it was an issue of the fluid(which it clearly isn't), then why only 2nd gear? Follow that logic?

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Why only second gear? Because the ratio change from 1st to 2nd is larger than the other gears, so the stop rings have to work harder on the 1-2 shift.

Fluid type has an effect on stop ring efficiency, slippery fluid isn't good.

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Think about it, if it was an issue of the fluid(which it clearly isn't), then why only 2nd gear? Follow that logic?

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Why only second gear? Because the ratio change from 1st to 2nd is larger than the other gears, so the stop rings have to work harder on the 1-2 shift.

Fluid type has an effect on stop ring efficiency, slippery fluid isn't good.

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have actually had guys tell me that ATF displaces better than synchromesh or gear oil which would be better for the synchros. I just picked up some Type F ATF for a pretty good price, so im going to try it out...hopefully it works but if not im going to have to special order some GL4...the transmission is gonna have seen every fluid besides engine oil lol

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I've NEVER tried Type F. I use Dextron.

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have actually had guys tell me that ATF displaces better than synchromesh or gear oil which would be better for the synchros. I just picked up some Type F ATF for a pretty good price, so im going to try it out...hopefully it works but if not im going to have to special order some GL4...the transmission is gonna have seen every fluid besides engine oil lol

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I've NEVER tried Type F. I use Dextron.

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Type F is supposed to have more friction modifiers in it. It's less sliperier.....

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True. GM and chrysler used servos and governors to modify shift points. Ford tuned with the fluid itself. Ive been told to use Dexron/Mercron to but would the synchronizers need benefit from a friction adder? Im sure the gears and bearings wouldn't though.