4hp22 emissions testing

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Emissions test should be done as quickly as possible not using any more throttle than is needed. No more than 50% of full speed for a short time. Over revving any automatic with the gear box in park or neutral for any length of time can damage the gearbox.
 
normally if you go for a mot emission testing first ; the mechanic will push the gas pedal hard down to the floor , this will kill the transmission ,
 
hi , :confused::confused: will emissions testing destroy the 4 hp22 auto transmission if the engine is on high idle 2500 rpm :D:D.

The common fault which often destroyed 4hp22 clutch packs if revved in neutral or park after the transmissions had been in gear was fixed by the time the P38 came along. The front clutch pack's pressure failed to bleed down and would be torn to shreds by revving in park or neutral. To be safe with automatic transmissions, the engine should always be switched off for 30 seconds to allow the fluid pressure to dissipate completely, then restarted and left in park.
 
i think the problem still exit ;; the p38 4hp22 transmission is not fix, i have never known that i have turn the engine OFF for 30 second ,, thank ,
 
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