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E550W4
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1,879 Posts
Discussion Starter #1
I was told that the V8 transmissions tend to last longer than the I6 because the V8s rarely rev that high. On my 400E, unless in a moment of stop light anger, my RPMs rarely get above 2,500-3,000 rpm.

Any truth to this theory?
 

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1996, A124, E320 Sportline Cabriolet x 2
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1,555 Posts
More revs = less torque for same power, torque kills transmissions.........
 

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'95 E300 DIESEL, '91 600SEL, '92 600SEL
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17,366 Posts
Yup, torque is the enemy of transmissions. As an example, Brabus detunes some of their engines to prevent torque from destroying the transmissions.

I don't think even the Honda boys have to worry about killing the trans when VTEC kicks in and revs to 7-8K on the dial (a.k.a all noise, no torque)
 

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1996, A124, E320 Sportline Cabriolet x 2
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1,555 Posts
Depends on how well these transmissions deal with RPM, but the Engineering principal (relating to loading, speed and power) remains. Certainly RPM is no problem with mine!!
 

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E550W4
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1,879 Posts
Discussion Starter #6
Is the 400E/E420/500E transmission any more robust than the other W124 transmissions?
 

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1995 E320 Cabriolet, 2007 E350 Sport P2, 1995 E420
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406 Posts
I bought my E420 with about 60K miles and saw the receipts for reverse having been rebuilt, not sure if that is an anomaly.
 

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Cruise Control
'87 300TD/'90 300D/'94 Quattro/'89 Vanagon TDI/'01 EV Weekender VR6
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52,233 Posts
Other than the bellhousing sections, I'm not sure the guts of the 722.3 are much different between the 6 and 8 cylinders
 

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'87 300TD/'90 300D/'94 Quattro/'89 Vanagon TDI/'01 EV Weekender VR6
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52,233 Posts
I think those changes can be added to any 722.3 trans. If my memory serves, the used trans I bought for my project wagon was rebuilt with kevlar clutch packs intended for R129 V12 models.
 
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