Center driveshaft lengths

[Bryan K.]

Hey guys, I just pulled my DBXL apart for some upgrades and I seem to have mixed up both center drive shafts. I didn't realize they were different lengths and didn't bother taking note of which one goes where. Glad to see that the pins are replaceable. The pins were flattened to about half of their size. I had some Dark souls meaty bone's pins laying around and hammered some into there. Should be better than the stock ones.

I noticed some wear on the tip of ball end of the shafts going into the cup. I suspect that I had them reversed the whole time. I built the DBXL from scratch, so not the manufactures fault. The long shaft was in the wrong place. The lengths are so close it's almost impossible to tell which one goes where. Also, I can't compare pics online because all the designs seem to have been updated.

 

[DougStar]

Oh ? its a close call????

 

[Bryan K.]

Tell me about it. I was looking into the FLM ones as replacements and noticed they have 2 holes for length adjustments so you can use them on both front and rear but no indication of which length goes where.

 

[DougStar]

Where is @Seandonato73 hes the dbxl guru ???

 

[21bangbang]

I went long in the front with my flm's. Was I correct ?‍ but its working just fine.

 

[Bryan K.]

Interesting, there's no documentation that came with the product?

Anyways, I think that's correct. I noticed if I put the shorter one up front the dog bone pins just sit on the outer edge of the center diff cup. I'm pretty sure I had the long ones in the back by accident and that's what was causing the wear around the rounded portion of the dog bone. Also, it would explain why my shafts were getting so hot when I was running my brushless setup. Looks like there was too much friction on the dog bone.

I'll run the longer ones up front and the shorter in the rear. Thanks for the info. However, if someone would just confirm so my paranoia doesn't get to me.

thanks guys,

 

[21bangbang]

Interesting, there's no documentation that came with the product?

Anyways, I think that's correct. I noticed if I put the shorter one up front the dog bone pins just sit on the outer edge of the center diff cup. I'm pretty sure I had the long ones in the back by accident and that's what was causing the wear around the rounded portion of the dog bone. Also, it would explain why my shafts were getting so hot when I was running my brushless setup. Looks like there was too much friction on the dog bone.

I'll run the longer ones up front and the shorter in the rear. Thanks for the info. However, if someone would just confirm so my paranoia doesn't get to me.

thanks guys,

It may have had a piece of paper with it, but im not really a instructions kind of guy. Unless im just totally lost.

 

[Jshaff16]

The flms are nice...until you try to take them apart...just saying them m3x3mm ss screws strip immediately.

 

[Seandonato73]

The films are marked f and r so it doesn't need instructions. Long one up front. And flm must have changed what screws they send out as mine have regular steel grub screws not stainless.

 

[Bryan K.]

Cheers, thanks for the confirmation. I definitely had them reversed. I ran them like that for years!

 

[Jshaff16]

The films are marked f and r so it doesn't need instructions. Long one up front. And flm must have changed what screws they send out as mine have regular steel grub screws not stainless.

Ive had 2 sets now...both with super soft (and too long) stainless screws to hold the pins in from backing out. However Regina over at FLM sent me a rebuild kit...and the screws are'nt SS this time. Still waiting on UPS before i do any work.

 

[Seandonato73]

I've got mine umm last winter when I did my full rebuild. Must have switched suppliers or something. I did have to grind down the keeper screws for the pins. Which I detailed in my thread "tear the ole girl down"

 

[Jshaff16]

I'll check it out now. I'll be doing something to mine too. As far as I can tell the head of said screw is designed to hold in the pin...no more no less. I plan on cutting screws down to 2.5mm or so...that's the height of my nut. And don't worry...I have "extras"

 

[Seandonato73]

Yeah it works good as far as not kicking the pin out. Just have to watch it doesn't get tour starring rack

 

[Jshaff16]

Don't worry...rack is already grooved out for clearances lol...hoping I can lob these tiny screws off cleanly on my band saw. Probably easiest with what I have available. Gonna spend a good few hours getting it together again tomorrow

 

[EdwardSimpson]

Yeah Yeah looks good

 

[Jshaff16]

Much better...cutting the screws down was a bit interesting but got er done. Booted everything. It's chilly out so won't run it a day or two. Let my locktite set up real good

 

[Seandonato73]

Cheers mate, looks well done.

 

[Jshaff16]

May go out tomorrow for a bit...street tires and all. With the schools closed there is a high school right up the block. Go get a few passes in. Tune it up real good for when it finally warms up. Wish my china order would show up too