Unfortunately, I doubt there are 10 Q in entire US with an AT temperature gauge.
People seem frugal in adding instrumentalities when these thinggs might save a car especially a cylinder heat temperature gauge.
Transmission life expectancy versus temperature chart
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bullittandy
- Posts: 1415
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Re: Transmission life expectancy versus temperature chart (Q45tech)
I added a tranny oil temp gauge to my old 55 Chevy but it was a bit of a let down b/c with the big tranny cooler that I installed it never went above 180-even towing a big trailer one time.Q45tech wrote:Unfortunately, I doubt there are 10 Q in entire US with an AT temperature gauge.
People seem frugal in adding instrumentalities when these thinggs might save a car especially a cylinder heat temperature gauge.
You either need a cooler or a gauge.
Re: Transmission life expectancy versus temperature chart (Q45tech)
hey my name is walter. I just bought a used q45t about a week ago what do i need to do about the tranny slippin , mine does that in first and second i want to take it back to the shop where i got it from. none of them are good mechanics thoughh. funds are low so i realy have no other way.
what can i do to fix this problem i think clutches are slipping though? help
[email protected]
what can i do to fix this problem i think clutches are slipping though? help
[email protected]
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maxnix
- Posts: 22628
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- Car: 1995 Infiniti Q45
1995 Infiniti Q45t
2000 Infiniti Q45
Re: Transmission life expectancy versus temperature chart (q45_Tech)
Walter, welcome to NICO.q45_Tech wrote:hey my name is walter. I just bought a used q45t about a week ago what do i need to do about the tranny slippin , mine does that in first and second i want to take it back to the shop where i got it from. none of them are good mechanics thoughh. funds are low so i realy have no other way.
what can i do to fix this problem i think clutches are slipping though? help
[email protected]
May I suggest reregistering with another board name? It is a little too much like one of our most revered members, Q45tech who has a vast technical knowledge of the G50 in particular. It would be best for our new and future members to avoid confusion. Thank you.
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Q45tech
- Moderator
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1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl
Re: Transmission life expectancy versus temperature chart (bullittandy)
Old fashioned 3 speeds [without overdrive] ran much cooler.
The overdrive and it's lockup clutches are the weak point in any 4 speed or higher AT.
The overdrive and it's lockup clutches are the weak point in any 4 speed or higher AT.
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bullittandy
- Posts: 1415
- Joined: Thu Jul 21, 2005 4:57 pm
- Car: 2003 Q45, 70K miles, 1999 Q45 touring 180K miles, 1997 Q45 270K miles, (sold), 1997 Q45 186K miles (junk-sold)
- Location: Atlanta
- Contact:
Re: Transmission life expectancy versus temperature chart (Q45tech)
Sorry, didn't specify, it was a 350 with a 700R4,, and I added the big cooler and gauge after cooking a local rebuild hauling styrofoam. I'm not kidding, the foam was about 8 feet tall on the trailer and created a huge aero drag. Should've figured since it felt like a "jake brake" when I took my foot off the gas.Q45tech wrote:Old fashioned 3 speeds [without overdrive] ran much cooler.
The overdrive and it's lockup clutches are the weak point in any 4 speed or higher AT.
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szh
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Unfortunately, no longer a Nissan or Infiniti, but continuing here at NICO! - Location: San Jose, CA
Re: Transmission life expectancy versus temperature chart (Q45tech)
Hmmm ... can you recommend a source for an AT temp gauge that works well? Having been through an expensive transmission repair (on an earlier Q ... not my current car), I'd like to avoid that again.Q45tech wrote:Unfortunately, I doubt there are 10 Q in entire US with an AT temperature gauge.
Z
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szh
- Posts: 18857
- Joined: Tue Jul 23, 2002 12:54 pm
- Car: 2018 Tesla Model 3.
Unfortunately, no longer a Nissan or Infiniti, but continuing here at NICO! - Location: San Jose, CA
Re: Transmission life expectancy versus temperature chart (szhosain)
By the way, here is some info from a post by Dennis years ago (I think it is pre-NICO era information! ):
ZQ45tech wrote:Automatic transmission fluid will provide 80,000 miles of service before oxidation occurs under normal operating temperatures of about 174°F. Above normal operating temperatures, the oxidation rate doubles (useful life of fluid is cut in half) with each 20° increase in temperature.
The approximate life expectancy at various temperatures is as follows:174°F 80,000 miles 195°F 50,000 miles 212°F 25,000 miles 235°F 12,000 miles 255°F 6,250 miles 275°F 3,000 miles 295°F 1,500 miles 315°F 750 miles 335°F 325 miles 355°F 160 miles 375°F 80 miles 390°F 40 miles 415°F Less than 30 minutes
This information clearly shows why transmission oil coolers and the various maintenance intervals are recommended for non ideal usage.
Above 270°F, the metals inside the transmission will warp and distort in varying degrees depending on the severity of overheat. Because this damage occurs and fluid life is so seriously impaired, rocking out of snow, mud or sand should never exceed a very few minutes.
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