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Most people around here already know that the VR-4 automatic transmission (code W5A51) has a reputation for sudden failure requiring an expensive rebuild. This thread is for discussion of the possibility of doing an cheap DIY fix for the most problematic part - the low/reverse wave spring. I've been gathering some encouraging information, so excuse me while I dump it here and feel free to chime in.
Below is the workshop manual courtesy of mivec.co.nz for the 4 speed front-wheel drive transmissions F4A41, F4A42, F4A51 but I believe the majority of information is useful and relevant to us. I'll also be posting up sections from the PDF for discussion.
Download the A/T workshop manual PDF
Below here is the complete parts shopping list for this fix.
Pricing as at 29/01/10 (without postage).
*Alternatively you can try sourcing aftermarket ones as follows:
Sizing: Japanese "JIS B 2401" standard
Material: Nitrile (Buna-N) 70 Duro
MR486844 replacement = 9.8mm ID x 1.9mm C/S (6 needed)
MD756673 replacement = 37.7mm ID x 3.5mm C/S (1 needed)
Optional Parts MD760146 & MD760147:
Metal seals that the workshop manual recommends replacing. These are very easy to change. However, if you are strapped for cash and your car has low mileage then you can probably skip them.
Below is the workshop manual courtesy of mivec.co.nz for the 4 speed front-wheel drive transmissions F4A41, F4A42, F4A51 but I believe the majority of information is useful and relevant to us. I'll also be posting up sections from the PDF for discussion.
Download the A/T workshop manual PDF
Below here is the complete parts shopping list for this fix.
Pricing as at 29/01/10 (without postage).
Code:
1 x 2741A007 SPRING,A/T L-R BRAKE WAVE NZ$12.00 ~ AU$ 9.50
1 x MD974421 LIQUID GASKET,A/T NZ$66.00 ~ AU$52.00
1 x MD757211 OIL SEAL,A/T 2ND BRAKE RETAINER NZ$ 8.00 ~ AU$ 6.50
6 x MR486844* O-RING,A/T CASE NZ$12.00 ~ AU$ 9.50
1 x MD756673* O-RING,A/T CASE NZ$ 4.00 ~ AU$ 3.00
1 x MR486686 GASKET,A/T VALVE BODY NZ$13.00 ~ AU$10.00
2 x MD760146 SEAL RING,A/T CASE NZ$32.00 ~ AU$25.00 (Optional)
2 x MD760147 SEAL RING,A/T CASE NZ$32.00 ~ AU$25.00 (Optional)
---------------------
TOTAL NZ$179.00 ~ AU$140.50
Sizing: Japanese "JIS B 2401" standard
Material: Nitrile (Buna-N) 70 Duro
MR486844 replacement = 9.8mm ID x 1.9mm C/S (6 needed)
MD756673 replacement = 37.7mm ID x 3.5mm C/S (1 needed)
Optional Parts MD760146 & MD760147:
Metal seals that the workshop manual recommends replacing. These are very easy to change. However, if you are strapped for cash and your car has low mileage then you can probably skip them.