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Transmission pan bolts

19K views 19 replies 12 participants last post by  sheila  
#1 ·
I just got my 2004 Sable (Vulcan) back from an oil change (115,000 miles).

The mechanic mention that the tranny oil pan was missing 2 bolts. It seems pretty weird that they would loosen so much and disappear, doesn't it? I had flushes done at 30k, 60k and 90k,but I don't think they remove the pan, do they? If so, then maybe they never retightened them properly.

Does anyone know what size bolts I need for replacement? The mechanic did not have any spares there for replacement and didn't mention what I needed.

Thanks!
 
#2 ·
They dont remove the pan typically. However, things can work their way loose.

Have any junkyards near you? Thatd be best for a direct fit replacement.

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#3 ·
Crawl under there and unscrew one, then head on over to the local nut and bolt house and pick up a few.....I highly recommend using a torque wrench when tightening those trans pan bolts.
 
#12 ·
Going forward, when ever I am at the salvage yard I keep all the bolts when I pull something off. They are usually in good condition in side the car. Ford uses m6 all over. I sorted my tackle box with nothing but m6 fasteners.

Example: the rock guard had 3 that were really corroded. Easily replaced with 3 newer from an ODB2 bracket.

Keep your spare hardware organized.



I like to use a similar star pattern when tightening these pan bolts. Like wheel lugs. I bolt it up, leaving a thread or two left for each one. Then tighten with spanner handle skip 3, tighten with spanner. Etc.

A spanner is what my tool kit calls a screw driver with a 1/4 " socket drive.

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#7 ·
1/4" drive ratchet will keep you from over snugging. Only need something like 10 ft/lbs.
 
#9 ·
M6 bolts with 10mm wrench heads

1. Missing bolts usually indicate the the corresponding transmission thread is stripped. Time to install some threaded inserts.
2. The pan probably was dropped to replace the filter at some point. An impact gun strips these bolts almost instantly.
3. I replaced the standard M6x10x15 bolts with these oversized head 10mm vs 8mm from Belmetric:
https://www.belmetric.com/bf6x16-fl...m/bf6x16-flange-bolt-109-p-394.html?zenid=ukhmdmfgik748gp34rguk9ljb0&cPath=2_67

Gives a much better seal.
 
#14 · (Edited)
I called two separate dealers in my area. Both confirmed the size is M6 x 1.0 - 18mm long flange head, hex drive. Same for both AX4S and AX4N.

Pack of 20 is available with part number: N811-076s437


If you go to your local auto parts store, and they probably don't carry a flange head. Pickup a pack of washers too.
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#15 ·
I called two separate dealers in my area. Both confirmed the size is M6 x 1.0 - 18mm long flange head, hex drive. Same for both AX4S and AX4N.

Pack of 20 is available with part number: N811-076s437


If you go you yoir local parts store a, they probably don't carry a flange head. Pickup a pack of washers too.
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Nice assist. And it's not even wiring related!
 
#16 ·
I picked up a couple flange head M6 x 1 x 15 from Ace Hardware, $0.50/each.
They also had 20s, but don't want to chance bottoming out the bolt.

I remember Autozone had a selection of packages with flange head bolts so they probably had something that would have worked. And the local Pep Boys had boxes labeled for them but they were out. I couldn't find flange head types at Home Depot.
 
#17 ·
@Jag1959 - I'm a bit of a threaded fastener Nerd too. I have an 18-slot organizer just for M6. I am looking to build a thread checker for my work shop.

Your best bet is a Fastenal dealer. It's literally a screw store for businesses. They are generally open to the public. Like greybar or grainger supply. Their prices are based on contracts.

Most sell screws in bags of 100. If your lucky, you find that will sell you "loosies" . To bad they close at 5pm.

But I think I will start pulling TX pan bolts the next time I'm at U-Pull, just in case

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