A440F with an 1HD-T engine

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Mar 8, 2020
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39
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Rescue, CA
I've installed a 1HD-T engine to my HZJ77 cruiser, replacing the stock 1HZ. I've left the original A440F transmission in as it bolted right up to the 1HD-T, but it keeps failing after extended driving. I keep the vehicle under 120kph, typically around 100kph max on Freeway yet it is now leaking fluid. Any thoughts? Do I need a different transmission for the 1HD-T? Do I need a transmission cooler? Thanks for any assistance.

John
 

Gun Runner 5

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Oct 22, 2009
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Thomasville, GA
What is it doing that constitutes “failing”?
 
Joined
Mar 8, 2020
Messages
39
Location
Rescue, CA
What is it doing that constitutes “failing”?
Fluid started leaking out of it while driving, I smelled burning oil and stopped and looked under the vehicle. I think between the bell housing, maybe from the torque converter. This happened once before and it stopped working completely on a long trip and I had to have it rebuilt and a new torque converter installed.
 
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Jun 13, 2014
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Milano - Italy
HDT has more torque the HZ1 , that might be the problem .
also more power , but with gear boxes , manual and automatic the killer is the torque
 
Joined
Mar 8, 2020
Messages
39
Location
Rescue, CA
HDT has more torque the HZ1 , that might be the problem .
also more power , but with gear boxes , manual and automatic the killer is the torque
Perhaps a different torque converter might solve the problem?
 

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