Hello from Sydney, Australia
Hi Guys,
As requested, I've just joined your forum to answer some of the questions that you may all have. It's a great community that you all have formed here.
To confirm, here are the options and variants of the G-Series gear sets:
1st~4th dog engagement, straight cut (racing use only)
1st~4th synchromesh engagement, straight cut (Optional helical)
(Stock 5th gear is used with all versions. Billet 5th gear set is available as an option)
Crown wheel and pinion optional (available in a number or ratios including custom)
3rd & 4th gears can be supplied in single and double synchromesh versions
3rd & 4th gears can be supplied in needle roller or std versions
All gears can be supplied in straight cut or helical (optional) versions
All of the options do not attract any extra cost. The only extra cost will be the purchase of new Mazda double synchromesh assemblies if your transmission is single and you choose the double synchromesh gears. We will supply the Mazda part numbers to make it easy.
The only lubricant that we recommend to use with out gear sets is the NEO Synthetic 75w90HD or 75w90RHD gear oil. It's made in the USA and used in all forms of professional upper echelon motorsport. These are a GL5/GL6 API rated lubricants.
I've multi-quoted many of the questions with our response/comments below.
do you guys do shipping for Spain ? it would be a hell of a deal since the Euro its insanely higher than the USA Dollars... i might be interested on buying these to have it when i up the boost and the actual tranny setup im running pops !!!
We ship our products all over the world by normal postal service or UPS for Expedited delivery. If purchased as part of a big group deal, we can drop ship directly to each person, or to a single person for distribution.
yea but dog boxes are the s***
We only every recommend dog engagement gear sets for customers who use their vehicles for racing use only. Some customers like the dog sets for street use, but 95% of normal street drivers will experience accelerated dog wear due to the extremely different shifting techniques required compared to a normal synchromesh engagement transmission.
but, do you need to send then your old tranny ? or how does it works..
We usually supply the parts to replace the OEM items into your transmission. The fitment can usually be performed by any reputable transmission overhaul shop if they have experience overhauling the G-Series. The only technically challenging part is the need to grind the pinion shaft to a set OD for certain gears if you would like to fit the needle roller bearings. We make a large number of variants to suit different customer's requirements.
Does PAR offer any kind of warranty on their gearsets? I'm on tranny #3 now (chewed through GTX gears even) so I need a replacement...
PAR offers a 6 months parts and workmanship warranty. This does not include abusive shifting which may damage stock synchroniser and shifting parts which may in turn damage the gear set.
Straight Cut Gears are no good for a daily driving car, since they make such a loud ass noise, i dont think anyone here wants to hear that noise all day long, just imagine 5th gear on straight cut and a long trip... Its better to have Helical Cut Cryo treated gears i guess..
also whats the point of helical cut gears if they are the same as stock ?
Our straight cut gears have minimal noise due to the precision and minimal backlash set by our production team. As mentioned previously in other posts, The advantage of the straight cut gears is the minimal stress placed on the transmission housing compared to the helical version. We have had many customers rip the end of the transmission housing apart when pushing extreme horse power.
As an option, we can also supply a housing reinforcement kit which slips into the housing and reinforces the bearing retainers/cups. Fitment of this kit requires precision machining of the transmission case on CNC equipment though.
The helical gears we manufacture use a massive tooth profile compared to the stock OEM item. This provides much more strength and torque capability. The only downside is the extra noise generated. The factory item is cut with a very fine profile in order in the interest of NVH and comfort levels. We also use material that is much stronger than the stock items with all parts specially case hardened and shot peened for the best reliability and strength.
how is the engagement on the straight cut? would it be safe to get the PAR gear set with only 3rd & 4th gears being straight and rest helical or is it recomended all the same? Also what are the helical PAR gears rated for?
The PAR 3rd and 4th gear sets can be fitted along side the other stock transmission without any issues. They're designed to exactly fit within the parameters of the factory components that are being replaced.
I'm certain the 1-4 set requires the ring gear for the differential since the pinion gear it meshes with is part of the pinion shaft. Maybe I'm wrong but that's what I understood. All this transmission terminology is melting my brain!!
The 1st~4th gear set can be supplied with and without the crown wheel and pinion option.
Comes with the ring gear, if you buy the full gear set...
The crown wheel and pinion shaft is an optional extra to the base gear set.
Is the pinion (or crown forget which is which) part of the output shaft or is it pressed on?
The pinion shaft is the output shaft. The pinion gear that meshes and drives the differential crown wheel/ring gear is cut into the end of the shaft.
This picture is of the very first generation Mazda G-Series gear sets. They have since been updated with the very latest tooth profiles and many improvements upon the continuing feedback from many of our customers, from both the street and racing community.
Here are photos of the very latest synchromesh engagement gear set version which was just assembled yesterday.