Flush time: Nissanmatic or Mobil 1 ATF?

[Jesda]

I inquired at Bommarito Infiniti regarding a transmission flush. They're offering to do it with Nissanmatic fluid for about $130. The shop I went to last time will do it with Mobil 1 ATF for $240.

I was happy enough with Mobil 1 in my last Q. Does the Nissan fluid make the shifts any crisper or quicker?

[Q45tech]

Seems too inexpensive for 14 quarts of Nissamatic, that's what we charge for bulk [Exxon branded] Dexron 111g. Plus the 2 BG additives.

But maybe they can buy it in bulk?

[maxnix]

Does the Nissan fluid make the shifts any crisper or quicker?

Most likely not. But you can flush twice as often which is important.

Does it include pan drop, inspection and wipe clean? Filter and gasket replacement and new one time use bolts?

[heywier427]

a little off topic, but whats the deal with the one time use bolts. ive dropped many a pans as well as my own numerous times and never put in new bolts. what is the benifit/advantage? thanks

[squeefoo]

a little off topic, but whats the deal with the one time use bolts. ive dropped many a pans as well as my own numerous times and never put in new bolts. what is the benifit/advantage? thanks

It sounds cool. Never seen one fail. Merely a ruse to sell bolts...some fall for it.

Just as lather...rinse...repeat. Sold a lot more shampoo!

Transpan bolts aren't torque to yield, at least not on a Q.

[elwesso]

THey have some sealant stuff on them... I wonder if its more of a loctite or something... im not sure..

In joes kti for $40 they come with them anyway..

[squeefoo]

Tried to use M1 in my PS and after changing the fluid so many times... I give up. When the trans fluid comes up M1 is history since I'm so anal on PM. My rationale: Hope this helps Jesda.

Dug this up on disposable/TTY bolts, don't know how this bit of dogma keeps popping up. Even at the parts store I go to, they're always trying to sell me new bolts (they really should know me better after 20+ years ).Quote »Torque to yield is the method of tightening a fastener so that a high preload is achieved by tightening up the yield point of the fastener material. To do this consistently requires special equipment that monitors the tightening process. Basically, as the tightening is being completed the equipment monitors the torque verses angle of rotation of the fastener. When it deviates from a specified gradient by a certain amount the tool stops the tightening process. The deviation from a specified gradient indicates that the fastener material as yielded. [/quote]http://www.boltscience.com/pages/faq.htm#12Quote »Q: After using torque and angle, shouldn't the bolts be replaced? A: Don't confuse torque and angle with torque to yield. Torque to yield stretches the fastener past the point of where it will not return to its original length. This weakens the bolt and makes it unusable for repeated tightening. When you use the torque and angle method according to our directions, you will stretch the bolts to 75% of yield. This allows the bolts to be used repeatedly without fear of weakening them.

Q: How many times can your bolts be tightened? A: The correct answer to this question is: it depends. It depends upon the fatigue loads the bolts will see in use. The higher the loads, the shorter the fatigue life of the fastener. Our staff can assist you in selecting the proper bolts for your application and in turn, give you a reasonable estimation of the fatigue life of the bolts in your application. Bolts are nothing more than very stiff springs and as long as you do not stretch them past the yield point, they will return to their original length and can be tightened repeatedly. Some manufacturers are still supplying a torque number to tighten their bolts. As the bolts are reused, you actually change the surface finish of the threads and the underside of the bolts and by tightening to the same torque level, you will not have the same clamp load. In some instances, especially when using improper lubrication, the bolts can be tightened too tight and the bolts will have "yielded", all while using the torque method alone. Other manufacturer's "fix" is to sell you more bolts. It is our goal to help you understand the function of the bolt so you can use the bolts over and over instead of replacing your bolts before you really need to.[/quote]http://www.oliver-rods.com/lib...-2808

But not on trans pan bolts -can't even find a torque value in my '90 FSM...

[squeefoo]

THey have some sealant stuff on them... I wonder if its more of a loctite or something... im not sure..

In joes kti for $40 they come with them anyway..

I visited the Loctite booth at a manufacturers convention, and they kept talking up their new bolt spray process - it shoots them with locking compound.Started seeing it on bolts not too long after (maybe because I was familiar with it aferwards).It melts between the threads and glues them together mechanically.

[elwesso]

Look at the 2nd page of the MAJOR OVERHAUL section..... Its right there.. 6.5ft lbs... Basically thats snug witha 1/4in rachet.

[qship96]

mobil 1,amsoil,redline d4 are all 100% synthetic fluids- if nissmatic is not,I would go with one of the three above.I currently have 175,000 miles on my transmission using M1 or Redline d4 only-still shifts and behaves perfectly well!{annual fluid machine exchanges done for first 100k or so,then switched to the 2 minute drill method that effectively replaces 80-85% of the fluid}pan dropped/filter replaced at 115,000,and found little/no reason to ever repeat,as it was extremely clean- external filter replaced at 169,000 miles also.

[elwesso]

Ive been thinking about rigging up an external trans filter system that uses oil filters..

[maxnix]

Ive been thinking about rigging up an external trans filter system that uses oil filters..

Kind of like like a 1994-1996 G50? Now there's a thought!

[elwesso]

Kind of like like a 1994-1996 G50? Now there's a thought!

Just makes it easier and less expensive to replace than the factory ones..... The factory ones are like $50-60 and the kits that use oil filters are like $30 + filter.

[qship96]

just plumb in a Magnefine inline filter-goes in like a fuel filter,and is about 30-35$ to replace every 30-60k has both a mechanical filter cartridge like a oil filter and a big magnet to hold metal debris.---- can also install one in the power steering line for added protection!