Good afternoon folks,
'Adding an Automatic Transmission cooler to the M35/M45'
In reality this is such a universal upgrade (also easy to do) that technically it applies to any car with auto tranny. I decided to do this as I have a plan to get this car to the 300k mile mark. This upgrade will help longevity and reliability of the transmission. One EXTRA step you could take is to install a temp gauge kit. This would simply be installed inline next to the filter below. Some kits range from $75- $100.
1. Four Seasons 53015 Transmission Oil Cooler Hose, 54-Inch ($13.87)
https://www.amazon.com/gp/product/B000E ... UTF8&psc=1
2. Magnefine 3/8" Magnetic Inline Transmission/Power Steering Filter ($25.95)
https://www.amazon.com/gp/product/B0787 ... UTF8&psc=1
3. Hayden Automotive 677 Rapid-Cool Plate and Fin Transmission Cooler ($38.16)
https://www.amazon.com/gp/product/B000C ... UTF8&psc=1
4. Hose clamps ($5)
5. L shaped bracket and metal screw. ($5)
Be creative here. I reused an old one that I had laying around but any will do from the local hardware store.
Total Cost = $87.98
Step 1. Remove engine undershroud
Step 2. Look at the aluminum impact bar from below. Drill a hole 4" to the right of the tow hook. Pic 1
Step 3. Fasten your L shaped bracket to the cooler via any bolt and nut in your bolts and screws jar. Pic 2 and 3
Step 4. Connect and attach the rubber lines going to cooler. Clamp the ends going to cooler. Pic 4
To clarify: There is one hose that comes with the cooler and the one is the one your purchased.
Step 5. Attach cooler via the bracket against the impact bar. Make sure cooler is secure. Pic 5
Step 6. On the return line attach the inline filter. Use zip ties to fasten to radiator shroud. Pic 6
Step 7. Attach both lines to OEM cooler lines. Should look like Pic 7
Look at Pic 8 for reference of OEM cooler lines. Pic 9 is from outside the grill.
Took me about an hour and a half and I'm pretty slow. Wish I had a DIY guide like this so here I am paying it forward!
If you have any questions LMK