transmission making whining noise recently
10-27-18, 01:17 AM
#46
Possible gear set noise, has it been drifted, hot rodded etc? Over stressed planet bearings, ruined gear teeth, bad thrust bearings etc.
The video is a similar sound one of my cars made, and no idea for sure what causes it. It at first sounds like loose tc bolts, and even could be loose flex plate bolts, but mine didn't do it all the time, so that makes it very difficult. It could even be a pump cavitation sound like either low fluid level or pump sucking air some place.
The video is a similar sound one of my cars made, and no idea for sure what causes it. It at first sounds like loose tc bolts, and even could be loose flex plate bolts, but mine didn't do it all the time, so that makes it very difficult. It could even be a pump cavitation sound like either low fluid level or pump sucking air some place.
Last edited by dicer; 10-27-18 at 01:22 AM.
10-27-18, 04:24 AM
#47
We've had these discussions before. Baseline is that the Type IV is a known entity. Using other compatible fluids is fine too, we've seen varying results based on prior transmission issues and maintenance. Many variables along the way to say fluid X was the main cause. A general consensus is that with regular fluid changes and usual commuter driving we've seen them range from 200K miles+. Any neglect can have consequences. If fluid X works and you are happy, that's what matters.
10-27-18, 07:12 AM
#48
Racer
Please close this thread.Thank you.
10-27-18, 08:14 AM
#49
Racer
Possible gear set noise, has it been drifted, hot rodded etc? Over stressed planet bearings, ruined gear teeth, bad thrust bearings etc.
The video is a similar sound one of my cars made, and no idea for sure what causes it. It at first sounds like loose tc bolts, and even could be loose flex plate bolts, but mine didn't do it all the time, so that makes it very difficult. It could even be a pump cavitation sound like either low fluid level or pump sucking air some place.
The video is a similar sound one of my cars made, and no idea for sure what causes it. It at first sounds like loose tc bolts, and even could be loose flex plate bolts, but mine didn't do it all the time, so that makes it very difficult. It could even be a pump cavitation sound like either low fluid level or pump sucking air some place.
Time to rebuild or replace tranny?
10-28-18, 11:03 PM
#50
a customer of ours comes in driving a 93 ls400 with over 400k and put maxlife in 250k ago(and ever since) and guess what..no issues..personally i use type 4 from the dealer as i get it for less money..but dont sit here and tell me it will kill these trannys because i know differently.
That is nice to know. I'd like to hear more stories like that from others as well I'm all for more information on the topic.
I tried the quote deal and this new site software just jumps around too much.
Last edited by RA40; 10-29-18 at 12:24 AM. Reason: quote test-insertion
10-29-18, 06:36 AM
#51
when i had my transmission flushed for the first time (first actual service was a pan drop,fluid change/filter kit) they used dex3 and before i got home it wasnt shifting correctly...fluid was changed out with maxlife and it was in for about 10-15k with no issue..i started reading on this forum about using type 4 only so i switched. ive had mine since 05..has 210k on it and the transmission works great.
10-29-18, 06:53 AM
#52
It seems more age related that mileage. I had a few fail within a couple years of each other at various mileage. I had one go at around 230k and another at 180k'ish. The friction material just degrades over time and starts shedding off the clutches. Obviously miles and ESPECIALLY heat don't help. Heat is the real killer. When you start hearing a whine, that is your pump starving for fluid. When it's starving for fluid the pistons in the drums will not engage at full strength, especially in the rear. It's usually the 2nd brake that is totally burnt up in the ones I've been in to. The piston return springs are very strong. You need full pressure to fully engage the clutch. Although you may not feel it slipping, the clutches start to slip when the pump isn't able to provide full pressure. The by-product of slipping is heat. And the heat builds FAST, almost instantly. The heat makes the friction material brittle, the material starts to shed off the clutches and that material ends up in the strainer.
The clutch material should NEVER clog the strainer in a healthy trans. Once that material starts shedding off the clutches the fate is sealed.
The clutch material should NEVER clog the strainer in a healthy trans. Once that material starts shedding off the clutches the fate is sealed.
11-25-18, 06:52 PM
#54
Racer
Thread Starter
https://www.amsoil.com/shop/by-produ...mission-fluid/
I've put on over 1500 miles since the filter change, over 1000 miles in the past 3 days, and my transmission is shifting flawlessly and super smooth with the T4 that's in there. I got 25mpg with snow tires driving up to the Upper Peninsula of Michigan and back.
Last edited by Losiracer2; 11-25-18 at 06:58 PM.
11-27-18, 10:22 AM
#55
We've had these discussions before. Baseline is that the Type IV is a known entity. Using other compatible fluids is fine too, we've seen varying results based on prior transmission issues and maintenance. Many variables along the way to say fluid X was the main cause. A general consensus is that with regular fluid changes and usual commuter driving we've seen them range from 200K miles+. Any neglect can have consequences. If fluid X works and you are happy, that's what matters.
a customer of ours comes in driving a 93 ls400 with over 400k and put maxlife in 250k ago(and ever since) and guess what..no issues..personally i use type 4 from the dealer as i get it for less money..but dont sit here and tell me it will kill these trannys because i know differently.
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