big gear box bang auto box

morky · 21st September 2009, 11:06

please any info is much apprieciated
rover 75 2.0 v6 automatic
when selecting from park to reverse theres a bang
and from reverse to drive theres a bang
had it code read and it gave the code p1748 A/T 2-4 Brake duty soleniod open/short circuit to battery /ground ????

BigRuss · 21st September 2009, 12:00

Hi, and

to the club.

Did you have it code read on a generic tester or on a Testbook/T4 reason being is that sometimes generic testers give out false codes.

If it is correct then it's one of the solenoids that operate the gearbox, these are located under a cover on the front of the gearbox. There's nine solenoids in total, check the wiring connectors to the gearbox for damage or corrosion.

If you aren't up to attempting it, then best to take it to an auto tranmission specialist. If it is the solenoid that's faulty they should be able to replace it.

Other common cause of a bang when changing gear is the rear engine mounting.

Russ

Departed · 21st September 2009, 12:18

The description of the code seems consistent with the fault.

I would read Brake Duty as the pressure regulator (which varies the pressure by varying the duty cycle) and if this had failed shifts would be at full pressure hence the bang.

I'll try to have a look this evening.

However I echo Russ's statements.

morky · 25th September 2009, 16:23

its all fixed

stocktake · 25th September 2009, 16:39

Quote:

Originally Posted by morky

its all fixed

would be nice if you let us know the problem and the fix

21st September 2009, 11:06	#1
morky Newbie ROVER 75 Join Date: Sep 2009 Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts	big gear box bang auto box please any info is much apprieciated rover 75 2.0 v6 automatic when selecting from park to reverse theres a bang and from reverse to drive theres a bang had it code read and it gave the code p1748 A/T 2-4 Brake duty soleniod open/short circuit to battery /ground ????

21st September 2009, 12:00	#2
BigRuss Premium Trader 75 CDT Tourer,2.5 Launch Saloon, Omipro MG/Rover (T4) Join Date: Jul 2007 Location: Liversedge, West Yorkshire Posts: 5,420 Thanks: 1,105 Thanked 1,340 Times in 661 Posts	Hi, and to the club. Did you have it code read on a generic tester or on a Testbook/T4 reason being is that sometimes generic testers give out false codes. If it is correct then it's one of the solenoids that operate the gearbox, these are located under a cover on the front of the gearbox. There's nine solenoids in total, check the wiring connectors to the gearbox for damage or corrosion. If you aren't up to attempting it, then best to take it to an auto tranmission specialist. If it is the solenoid that's faulty they should be able to replace it. Other common cause of a bang when changing gear is the rear engine mounting. Russ __________________ Replacement Key Service http://https://the75andztclub.co.uk/...d.php?t=244732 Full T4 Testbook diagnostics available. Diesel ECU repair and replacement. Options enabled or disabled as required. Diesel X-Power 135 and "160", Rover 1.8T 150 to 160 MG 160 V6 to 177 upgrades available P.M. for details.

25th September 2009, 16:23	#4
morky Newbie ROVER 75 Join Date: Sep 2009 Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts	thankyou its all fixed

21st September 2009, 12:18	#3
Departed Retired -- Join Date: Jan 2007 Location: -- Posts: 3,785 Thanks: 0 Thanked 4 Times in 4 Posts	The description of the code seems consistent with the fault. I would read Brake Duty as the pressure regulator (which varies the pressure by varying the duty cycle) and if this had failed shifts would be at full pressure hence the bang. I'll try to have a look this evening. However I echo Russ's statements.