I was bounceing around on different web sites so I can't remember where I heard it. but this one site said that GM is dumping the 10 speed Ford -GM 10 speed Allison trans as they are having alot of failures. and that their going to switch to a 8 speed trans anybody else heard anything about that are the 10 speeds blowing up are what?
Ford-GM 10 speed allison transmissions
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krh
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That's what they say to appease people and pass blame. The demand is not high for the Allison 10-speed, nor is it high for nearly any other part someone needs. Production in all aspects has been greatly reduced to keep inventory lower and prices higher. They all learned this during the pandemic and aren't going to speed up things anytime soon. People needing parts for repair will be last to get served.
Chip shortages? LOL! Only on purpose now.
Interesting thing is the failed clutch packs had some grooves in the material that couldn't happen in a rotational manner, the tech felt the damage was there prior to the transmission build or damaged during the build. Parts were readily available for the trans at that time but the torque converter was on backorder.
Crap happens. 19+k on the odometer now and running like a charm, hopefully stays that way
Of the people that are having trans problems it would be interesting to know what percentage are stock vs modified. I've read in more than one place that the hp/torque of these l5p's is pushing the limits of the drivetrain and modifications (oversized tires/lifts etc...) are not recommended and should be avoided. Wonder if there's any truth to this or not?
I just got back from the dealership for the fluid leak on mine and my buddy told me he had another valvebody issue last week so that makes 3 he has seen in the past few months. All 3 trucks were bone stock, they were all business trucks. So maybe excessive idling may play a factor here. The one they had last week ended up needing the whole trans replaced and not just the valvebody like the other two he had seen.
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10R140 and 10L1000 info .....
10R140 Transmission Identification
The 10R140 is often confused with the Ford model 10R80 transmission and is commonly misquoted as being a relative of the Allison 10L1000 ten speed automatic transmission employed behind GM's 6.6L Duramax diesel. The light duty Ford 10R80 and GM 10L80 ten speed automatic transmissions are indeed the result of a joint venture between GM and Ford Motor Company, and thus there is significant parts commonality between the two transmissions. The GM-Allison 10L1000 and Ford 10R140 are two entirely different 10 speed automatic transmissions with zero parts commonality, alternative gear ratios, and separate transmission features.
The 10R140 is quickly identified by its composite fluid pan, which secures to the bottom of the transmission with 20 metric bolts (see figures 3 and 4 below). Additionally, the 10R140 oil cooler is uniquely mounted beneath the bellhousing of the transmission (see figure 6 below). A heat shield protects the passenger side the transmission pan from heat radiating off the exhaust aftertreatment system. The fluid pan features a large, serviceable o-ring type gasket (figure 5 below) secured within a integral groove in the fluid pan mounting flange.
A 10R140 logo is also cast into the transmission case near the range selection shift lever on the driver side of the transmission. Additionally, the transmission part number and shift solenoid information labels are visible in this general region (see figure 7 below). A large connector travels through the case near the rear of the transmission on the driver side and attaches to the chassis wiring harness (see figure 8 below).
![10r140 transmission logo embossed in case]( "10r140 transmission logo embossed in case")
Figure 7 - 10R140 transmission designation and logo cast into the transmission case
Ratios are different:
Allison 10L1000 10 Speed Automatic Transmission Ratios
10R140 TorqShift 10 Speed Gear Ratios
10R140 Transmission Identification
The 10R140 is often confused with the Ford model 10R80 transmission and is commonly misquoted as being a relative of the Allison 10L1000 ten speed automatic transmission employed behind GM's 6.6L Duramax diesel. The light duty Ford 10R80 and GM 10L80 ten speed automatic transmissions are indeed the result of a joint venture between GM and Ford Motor Company, and thus there is significant parts commonality between the two transmissions. The GM-Allison 10L1000 and Ford 10R140 are two entirely different 10 speed automatic transmissions with zero parts commonality, alternative gear ratios, and separate transmission features.
The 10R140 is quickly identified by its composite fluid pan, which secures to the bottom of the transmission with 20 metric bolts (see figures 3 and 4 below). Additionally, the 10R140 oil cooler is uniquely mounted beneath the bellhousing of the transmission (see figure 6 below). A heat shield protects the passenger side the transmission pan from heat radiating off the exhaust aftertreatment system. The fluid pan features a large, serviceable o-ring type gasket (figure 5 below) secured within a integral groove in the fluid pan mounting flange.
A 10R140 logo is also cast into the transmission case near the range selection shift lever on the driver side of the transmission. Additionally, the transmission part number and shift solenoid information labels are visible in this general region (see figure 7 below). A large connector travels through the case near the rear of the transmission on the driver side and attaches to the chassis wiring harness (see figure 8 below).
Figure 7 - 10R140 transmission designation and logo cast into the transmission case
Ratios are different:
Allison 10L1000 10 Speed Automatic Transmission Ratios
1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | R |
4.54 : 1 | 2.86 : 1 | 2.06 : 1 | 1.72 : 1 | 1.48 : 1 | 1.26 : 1 | 1.00 : 1 | 0.85 : 1 | 0.68 : 1 | 0.63 : 1 | 4.54 : 1 |
10R140 TorqShift 10 Speed Gear Ratios
Gear | Ratio |
1st | 4.615 : 1 |
2nd | 2.919 : 1 |
3rd | 2.132 : 1 |
4th | 1.773 : 1 |
5th | 1.519 : 1 |
6th | 1.277 : 1 |
7th | 1.00 : 1 |
8th | 0.85 : 1 |
9th | 0.687 : 1 |
10th | 0.632 : 1 |
Reverse | 4.695 : 1 |
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Ford 10R80, GM 10L80 10 Speed Transmission
10R80, 10L80 10 Speed Automatic Transmission Specs
The 10R80/10L80 10 speed automatic transmission is the result of a collaboration between Ford Motor Company and General Motors. Ford refers to the transmission as the "10R80", while GM has designated it the Hydra-Matic 10L80 (Hydra-Matic being GM's long running trademark). Looking at the big picture, the GM and Ford versions of the transmissions are physically identical; the primary differences between the two variants lies in the electronic controls, which are closely integrated with each manufacturer's respective powertrain options.
Ford 10R80/GM 10L80 Transmission Ratios
*Note - GM and Ford report slightly different gear ratios as a result of preferences in rounding
10R80, 10L80 10 Speed Automatic Transmission Specs
The 10R80/10L80 10 speed automatic transmission is the result of a collaboration between Ford Motor Company and General Motors. Ford refers to the transmission as the "10R80", while GM has designated it the Hydra-Matic 10L80 (Hydra-Matic being GM's long running trademark). Looking at the big picture, the GM and Ford versions of the transmissions are physically identical; the primary differences between the two variants lies in the electronic controls, which are closely integrated with each manufacturer's respective powertrain options.
Ford 10R80/GM 10L80 Transmission Ratios
1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | R |
4.70 : 1 | 2.99 : 1 | 2.15 : 1 | 1.80 : 1 | 1.52 : 1 | 1.28 : 1 | 1.00 : 1 | 0.85 : 1 | 0.69 : 1 | 0.64 : 1 | 4.87 : 1 |
41 - 46 of 46 Posts
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